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ACCENTUM True Wireless
True Wireless stereo earbuds
Model: ATW1, ATW1 R, ATW1 L, ATW1 C
Instruction manual
Use the search function, the navigation (left) or the following links:
Start
“Product overview”
“Getting started”
“Using the earbuds”
“FAQ/If a problem occurs ...”
“Specifications”
Sonova Consumer Hearing GmbH
Am Labor 1
30900 Wedemark
Germany
www.sennheiser-hearing.com
Version: 04/24 A01
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Important safety instructions
Important safety instructions
▷ Read this instruction manual carefully and completely before
using the product.
▷ Always include this instruction manual when passing the product
on to third parties.
▷ Do not use the product if it is obviously defective or makes loud,
unusual (whistling or beeping) noise.
▷ Only use the product in environments where Bluetooth® wireless
transmission is permitted.
Preventing damage to health and accidents
▷ Protect your hearing from high volume levels. Permanent
hearing damage may occur when earbuds are used at
high volume levels for long periods of time. Sennheiser
earbuds sound exceptionally good at low and medium volume levels.
▷ Do not insert the earbuds too deep into your ears and never insert
them without ear tips. Always remove the earbuds slowly and
carefully from your ears.
▷ The product generates stronger permanent mag-
netic fields that could cause interference with cardiac pacemakers, implanted defibrillators (ICDs)
and other implants. Always maintain a distance of at least 3.94"/
10 cm between the product component containing the magnet
(earbuds and charging case) and the cardiac pacemaker,
implanted defibrillator, or other implant.
▷ Keep the product, accessories and packaging parts out of reach
of children and pets to prevent accidents. Swallowing and choking hazard.
▷ Do not use the product in an environment that requires your spe-
cial attention (e.g. in traffic). Especially the product’s active noise
cancellation can make ambient sounds inaudible or drastically
change the perception of acoustic warning signals.
2 | ACCENTUM True Wireless
Preventing damage to the product and malfunctions
▷ Always keep the product dry and do not expose it to extreme tem-
peratures (hairdryer, heater, extended exposure to sunlight, etc.)
to avoid corrosion or deformation. The normal operating temperature is from 0 °C to 40 °C/32 °F to 104 °F.
▷ To avoid loud, unusual (whistling or beeping) noise and to ensure
proper noise cancellation, do not cover the microphone openings
of the active noise cancellation circuitry located on the outside of
the earbuds.
▷ Use only attachments/accessories/spare parts supplied or rec-
ommended by Sonova Consumer Hearing.
▷ Clean the product only with a soft, dry cloth. Product parts with
ingress protection (IP protection rating) can be cleaned with a
slightly damp cloth.
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Important safety instructions
Safety instructions for Lithium rechargeable batteries
WARNING
If abused or misused, rechargeable batteries may leak. In
extreme cases, they may even present a risk of:
•explosion
• heat and fire development
• smoke and/or gas development
• damage to health and/or the environment
Only use rechargeable batteries and chargers recommended by Sonova Consumer Hearing.
Do not leave the product/rechargeable batteries unattended while charging.
Only charge the product / rechargeable batteries at
ambient temperatures between 5 °C and 35 °C/41 °F
and 95 °F and do not charge them near easily flammable
objects.
Do not charge the product/rechargeable batteries in a
damp or humid environment. Make sure that the
charging socket is free from moisture and contamination.
Do not heat the product / rechargeable batteries above
60 °C/140 °F. Avoid exposure to sunlight and do not
throw the product / rechargeable batteries into fire.
Switch rechargeable battery-powered products off after
use.
When not using the product/rechargeable batteries for
extended periods of time, charge them regularly (about
every 3 months).
This product contains coin rechargeable batteries. If you
think the product/a coin rechargeable battery has been
swallowed or is lodged in the body, seek medical assistance immediately.
Avoid prolonged skin contact with the product,
rechargeable battery, charger or charging cable when
connected to a power source. These components can
heat up during charging and cause skin irritation.
Dispose of defective products with built-in rechargeable
batteries at special collection points or return them to
your specialist dealer to facilitate recycling.
Notes on the ingress protection rating of the earbuds
The earbuds feature an IP54 ingress protection rating which means
they are protected from the ingress of water (protection class
according to International Protection Marking (IP code), IEC standard
60529, tested under laboratory conditions).
The earbuds can be used in the rain, for example. However, they are
not suitable for immersion in water or for wearing in the shower. In
case of permanent moisture/wetness, the ingress protection can be
reduced and the product can be damaged.
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Important safety instructions
▷ Do not charge wet earbuds. Completely dry wet earbuds with a
dry cloth before charging them.
The charging case is not splash waterproof.
▷ Always keep the charging case dry.
▷ Ma ke sure that t he char g ing soc ket is free from mois ture an d con-
tamination.
If the charging case has become damp or wet:
▷ Dry the charging case completely with a dry cloth.
▷ Allow the charging case to dry at room temperature for at least 24
hours before using and charging it again.
▷ Do not continue to use the product if it is obviously defective.
Notes on data collection and processing and on firmware updates
This product stores individual settings such as the volume and the
Bluetooth addresses of paired devices. This data is required for the
operation of the product and is not transferred to Sonova Consumer
Hearing GmbH or companies commissioned by Sonova Consumer
Hearing GmbH and is not processed.
Using the “Sennheiser Smart Control” app, you can update the firmware of the product for free via an Internet connection. If the device
on which the app is installed is connected to the Internet, the following data is automatically transferred to and processed by Sonova
Consumer Hearing servers in order to provide and transfer suitable
firmware updates: hardware identifier, hardware revision number,
firmware version of the product, operating system type (Android,
iOS) and version, version of the app. The data is only used for the purpose of providing and transferring the firmware updates and is not
stored permanently.
If you do not want this data to be transferred and processed, do not
connect to the Internet.
Improper use/Liability
It is considered improper use when the product is used for any application not named in the corresponding product documentation.
Sonova Consumer Hearing GmbH is not liable for damages to
devices that are not consistent with the interface specifications
(USB). Sonova Consumer Hearing GmbH is not liable for damages
resulting from the loss of connection due to exceeding the Bluetooth
transmission range.
Sonova Consumer Hearing GmbH does not accept liability for
damage arising from misuse or improper use of this product and its
attachments/accessories.
Before putting into operation, please observe the respective country-specific regulations.
4 | ACCENTUM True Wireless
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Package contents
Earbud R for right ear (model: ATW1 R) and
earbud L for left ear (model: ATW1 L)
Charging case (model: ATW1 C) with built-in
rechargeable battery for the earbuds and wireless
charging function
USB charging cable with USB-C and USB-A connector, length approx. 0.4 m
Silicone ear tips (size XS, S, M (pre-mounted to the
earbuds) and L)
Package contents
Quick guide
Safety guide
Online you can find:
• this detailed instruction manual and additional information:
www.sennheiser-hearing.com/download
• the Sennheiser Smart Control app for configuring the earbuds
and for additional functions:
– Google Play Store: click
– Apple App Store: click
• a list of accessories on the ACCENTUM True Wireless product
page at
www.sennheiser-hearing.com/accentum-true-wireless
(to purchase online or contact your local Sonova Consumer Hearing partner:
www.sennheiser-hearing.com/service-support
)
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Product overview
1
8
6
2
3
5
4
7
7
9
7
Product overview
Charging case
Model: ATW1 C
LED display
indicates the charging process/charge status of the
rechargeable battery of the charging case or of the earbuds (when inserted into the charging case)
Input for USB-C connector
for charging the rechargeable batteries
Contact area
for wireless charging of the rechargeable battery
Built-in rechargeable battery for charging the earbuds on
the go
Type plate
Charging compartment for the right earbud
Magnetic holders
Charging compartment for the left earbud
Charging contacts
R
L
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Earbuds
B
A
F
E
D
G
0
C
B
A
H
E
D
G
0
C
ATW1 RATW1 L
Model: ATW1 R and ATW1 L
Built-in rechargeable battery
Product overview
Microphone for active noise cancellation ANC
for the perception of your surroundings (“Transparency
Mode”) and for phone calls
Touch control panel
Charging contacts
Magnetic holder
Status LED
Left earbud
Changeable silicone ear tips
Right earbud
L
R
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Product overview
5s
Overview of the LED display of the charging case
When a USB cable is connected or the charging case is placed on a
wireless charging pad, the LED display of the charging case permanently displays the charging process:
LED
pulses
yellow
lights up
green
flashes
red
Charging case WITH
earbuds inserted
Earbuds and
charging case are
being charged.
Earbuds and
charging case are
fully charged.
At least one earbud
has a charging
error/battery error
(> 41).
Charging case
WITHOUT earbuds
inserted
Charging case is
being charged.
Charging case is
fully charged.
Charging case has a
charging error/battery error (> 41).
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If you open the lid of the charging case and no USB cable is connected or the charging case is not placed on a wireless charging pad,
the LED display of the charging case displays the battery charge
status or the charging process of the earbuds. If you close the lid of
the charging case, the LED display goes off after 5 seconds.
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Product overview
LED
lights up
green
pulses
yellow
lights up
yellow
lights up
red
flashes
red
Charging case WITH
earbuds inserted
Earbuds are fully
charged, charging
case is more than
50 % charged.
Earbuds are being
charged via the
rechargeable battery of the charging
case.
Earbuds are fully
charged, charging
case is less than
50 % charged.
Rechargeable batteries of the earbuds
and the charging
case are almost
empty.
At least one earbud
has a charging
error/battery error
(> 41).
Charging case
WITHOUT earbuds
inserted
Charging case is
more than 50 %
charged.
–
Charging case is
charged less than
50 %.
Rechargeable battery of the charging
case is almost
empty.
Charging case has a
charging error/battery error (> 41).
If the LED display does not light up:
• Clean the contacts on the earbuds and in the charging case
(> 39).
• Make sure that the charging case rests on the wireless
charging pad (maximum distance 3 mm).
• Wait for at least 10 seconds. With some wireless charging
pads the charging process starts delayed.
• Observe the installation instructions of the wireless
charging pad and make sure that no electromagnetic fields
or materials influence the charging pad (see instruction
manual of the wireless charging pad).
• Charge the rechargeable batteries of the charging case and
the earbuds until the LED display lights up again (at least
30 minutes) (> 17).
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Product overview
3x
3x
Overview of the LED indications of the earbuds
LED Meaning
flashes red-blue
for approx.
2minutes
flashes blue 3x
flashes red 3x
lights up blue
lights up red
flashes red
quickly
flashes red
slowly
flashes redgreen for
approx. 1 minute
Earbuds are in Bluetooth pairing
mode.
Bluetooth pairing or earbud pairing
was successful.
Bluetooth pairing or earbud pairing
failed.
Earbuds are connected to a device
via Bluetooth.
Earbuds are not connected to a
device via Bluetooth or the connection has been interrupted.
Rechargeable battery is almost
empty.
System error is present. Perform a
reset (> 45).
Earbuds are in earbud pairing mode
(to pair the right and left earbud).
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When you insert the earbuds into your ears, the LEDs of the
earbuds automatically go off.
When you do not insert the earbuds into your ears, the LEDs of
the earbuds go off after 30 seconds.
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Product overview
Notes on voice prompts
The earbuds output voice prompts for events (the table gives some
examples). Using the Sennheiser Smart Control app, you can change
the language of the voice prompts, choose between voice prompts
and beep sounds, or deactivate the status messages with a few
exceptions (e.g. rechargeable battery is empty).
Voice prompt Meaning
“Power on” Earbuds are switched on.
“Power off” Earbuds switch off.
“Connected” Earbuds are connected via Blue-
tooth.
“No connection” Earbuds are not connected via
Bluetooth.
“Pairing” Earbuds are in Bluetooth pairing
mode.
“Pairing cancelled” Bluetooth pairing mode was can-
celled.
“Pairing successful” Bluetooth pairing was successful.
“Pairing failed” Bluetooth pairing was not success-
ful.
“Recharge headset” Rechargeable battery is almost
empty. Recharge the rechargeable
battery.
“Call rejected” Incoming call was rejected.
“Call ended” Call was ended.
“Mute on” Microphones are muted.
“Mute off” Muting of the microphones is can-
celed.
“Volume min” Volume is set to minimum.
“Volume max” Volume is set to maximum.
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Getting started
USB-C
USB-A
15s
1
2
3
Getting started
1. Waking up the earbuds and the charging case
and charging the rechargeable batteries
Upon delivery, the rechargeable batteries of the earbuds and the
charging case are in sleep mode and have to be woken up by connecting them to a USB power source once.
1. Insert the earbuds into the charging case and close the lid of the
charging case.
2. Connect the USB-C cable to the charging case.
3. Connect the cable to a USB power source (> 17) and charge the
rechargeable batteries for at least 15 seconds.
The earbuds and the charging case are woken up and the
rechargeable batteries are being charged. The earbuds are now
ready for use.
Waking up the rechargeable batteries is only possible when a
USB cable is connected to the charging case. The wireless
charging function cannot be used to wake up the rechargeable
batteries.
We recommend charging the earbuds and the charging case
for a complete charging cycle without interruption before using
for the first time.
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Getting started
L
M
S
XS
RightLeft
L
R
2. Selecting suitable ear tips for optimum fit of
the earbuds in the ears
The perceived sound quality including bass performance, the best
possible noise cancellation, the best voice quality for phone calls and
a secure hold of the earbuds in the ears depends to a large extent on
the correct fit of the earbuds. Therefore, you can choose between ear
tips in different sizes.
You can choose between 4 different ear tips in size XS, S, M and L (>
25).
▷ Test which ear tip size gives you the best sound quality and the
best wearing comfort.
▷ Assign the right earbud to your right ear and the left earbud to
your left ear.
▷ Insert the earbuds at a slight angle into the ears and twist them
slightly into the ear canal so that they sit comfortably and snugly
in the ear canal and auricle (> 26).
You can use the Fit Test function in the Smart Control app to
test the fit of the earbuds in your ears.
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Getting started
“Pairing“
L
R
3s
Smart Control
“Sennheiser Smart Control”
3. Connecting the earbuds to a Bluetooth device
When you switch on the earbuds for the first time after initial
charging, they automatically switch to Bluetooth pairing mode. If the
earbuds have not yet been paired with any Bluetooth device (the
pairing list is empty), pairing mode remains permanently activated.
▷ Connect the earbuds to your smartphone via Bluetooth (> 21).
4. Installing the Smart Control app on your
smartphone
The Sennheiser Smart Control app allows you to use all functions
and settings of the earbuds and to e.g. adjust the sound to your liking
using the equalizer (> 22).
– Google Play Store: click
– Apple App Store: click
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Getting started
3s
L
R
“Pairing“
5. Connecting additional Bluetooth devices
▷ If desired, connect the earbuds to additional devices via Blue-
tooth (> 21).
The earbuds can save the connection profiles of up to six Bluetooth
devices with which they have been paired. Audio playback is only
possible from one device at a time.
Using the Smart Control app (“Connections”), you can view the list of
paired devices and selectively connect and disconnect devices
(> 22).
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Using the earbuds
Using the earbuds
Information on the rechargeable battery, the charging process and the first use
The earbuds and the charging case each have a built-in rechargeable
battery.
To charge the rechargeable batteries, you can use one of the following options:
•the supplied USB cable
• a wireless charging pad (Qi-compatible, to be ordered separately)
The earbuds must be inserted into the charging case for charging.
Thus, even on the go, the earbuds are always safely stored and
charged.
Upon delivery, the rechargeable batteries of the earbuds and the
charging case are in sleep mode and have to be woken up by connecting them to a USB power source for at least 30 seconds. The lid
of the charging case must be closed during this process.
A complete charging cycle of the charging case and the earbuds
takes about 1.5 hours. The quick charge function gives you approx.
1 hour of playback time after 10 minutes of charging. The charging
time can vary depending on the power source used and the ambient
temperature.
We recommend charging the earbuds and the charging case for a
complete charging cycle without interruption before using for the
first time.
When a USB cable connected to a power source is also connected to
the charging case or when you place the charging case on a wireless
charging pad, the rechargeable battery of the charging case is being
charged. When the earbuds are inserted into the charging case, their
rechargeable batteries are being charged at the same time. The LED
display of the charging case indicates the charging process (> 8).
When the charge status of the earbuds’ rechargeable batteries
drops to a critical level, a voice prompt asks you to recharge the earbuds (“Recharge headset”).
The charge status of the rechargeable battery of the charging case
is indicated by the LED display on the charging case (> 8).
At the end of its operational lifetime, this product with its built-in
rechargeable battery must be disposed of separately from normal
household waste. You can find more information here: > 49.
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The earbuds feature an Eco mode that allows for longer battery
life (> 37) and a battery protection mode that ensures gentle
charging and thus longer battery life (> 37).
You can activate both modes via the Smart Control app.
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Using the earbuds
1
2
3
USB-C
USB-A
L
R
Charging the rechargeable batteries using the USB cable
1. Open the charging case by overcoming a slight magnetic resis-
tance and insert the left earbud into the left charging compartment and the right earbud into the right charging compartment.
The earbuds are magnetically pulled into the charging compartments.
2. M ake su re that the char ging so cket i s free f rom moi sture a nd con-
tamination. Connect the USB-C connector of the charging cable
to the USB socket of the charging case.
3. Connect the USB-A connector to a corresponding socket of a USB
power source (to be ordered separately). Make sure that the USB
power source is connected to the power supply system.
The rechargeable batteries of the earbuds and the charging case
are being charged.
If no earbuds are inserted into the charging case, only the
rechargeable battery of the charging case is being charged.
The LED display of the charging case indicates the charge status:
Charging case
WITHOUT earbuds
inserted
Charging case is
being charged.
Charging case is
fully charged.
Charging case has a
charging error/battery error (> 41).
LED
pulses
yellow
lights up
green
flashes
red
Charging case WITH
earbuds inserted
Earbuds and
charging case are
being charged.
Earbuds and
charging case are
fully charged.
At least one earbud
has a charging
error/battery error
(> 41).
If the LED display does not light up:
• Clean the contacts on the earbuds and in the charging case
(> 39).
• Clean the USB-C socket of the charging case.
• Charge the rechargeable batteries of the earbuds and the
charging case (at least 30 minutes) until the LED display
lights up again.
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Using the earbuds
1 2
L
R
Charging the rechargeable batteries wirelessly
1. Open the charging case by overcoming a slight magnetic resistance and insert the left earbud into the left charging compartment and the right earbud into the right charging compartment.
The earbuds are magnetically pulled into the charging compartments.
2. Place the bottom of the charging case centered on a wireless
charging pad (Qi-compatible, to be ordered separately).
The rechargeable batteries of the earbuds and the charging case
are being charged.
If no earbud is inserted into the charging case, only the rechargeable battery of the charging case is being charged.
The LED display of the charging case indicates the charge status:
LED
pulses
yellow
lights up
green
flashes
red
Charging case WITH
earbuds inserted
Earbuds and
charging case are
being charged.
Earbuds and
charging case are
fully charged.
At least one earbud
has a charging
error/battery error
(> 41).
Charging case
WITHOUT earbuds
inserted
Charging case is
being charged.
Charging case is
fully charged.
Charging case has a
charging error/battery error (> 41)
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Using the earbuds
If the LED display does not light up:
• Clean the contacts on the earbuds and in the charging case
(> 39).
• Make sure that the charging case rests on the wireless
charging pad (maximum distance 3 mm).
• Wait for at least 10 seconds. With some wireless charging
pads the charging process starts delayed.
• Observe the installation instructions of the wireless
charging pad and make sure that no electromagnetic fields
or materials influence the charging pad (see instruction
manual of the wireless charging pad).
• Charge the rechargeable batteries of the charging case and
the earbuds until the LED display lights up again (at least 30
minutes) (> 17).
Connecting the earbuds to a Bluetooth device
To be able to use the Bluetooth wireless connection, you must register both devices (earbuds and Bluetooth device, e.g. smartphone) via
the settings of your Bluetooth device. This process is called pairing.
If operation differs from the steps mentioned, also refer to the
instruction manual of the Bluetooth device you are using.
When you switch on the earbuds for the first time after initial
charging, they automatically switch to Bluetooth pairing mode.
Information on the Bluetooth wireless connection
The earbuds are Bluetooth 5.3, LE Audio and Auracast™ broadcast
audio certified.
Bluetooth
If your audio source supports one of the following high-resolution
audio coding methods, music is automatically played in high audio
quality: aptX™ or AAC. Otherwise the earbuds will play back your
music in normal audio quality (SBC). Depending on the Bluetooth
device used, playback via LE Audio is also possible. The used audio
coding is displayed via the Smart Control app.
Paired devices establish the Bluetooth wireless connection immediately after switch-on and are ready for use.
When switched on, the earbuds will automatically try to connect to
the last two Bluetooth devices used. The earbuds can save the connection profiles of up to six Bluetooth devices with which they have
been paired. Audio playback is only possible from one device at a
time.
If you pair the earbuds with the seventh Bluetooth device, the connection profile of the least used Bluetooth device will be overwritten.
If you want to connect to this Bluetooth device again later, you have
to pair the earbuds again.
Using the Smart Control app (“Connections”), you can view the list of
paired devices and selectively connect and disconnect devices (>
22).
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Using the earbuds
1
2
3
4
5
6
Smart Control
Stream 1 en
Stream 1 fr
Stream 1 zh
...
Stream 2 de
Stream 2 en
...
Stream 3 it
Stream 2
de
Stream 1 en
Stream 1 fr
Stream 1 zh
...
Stream 2 de
Stream 2 en
Stream 2 cs
...
Stream 3 it
Stream 3 en
...
Stream 1
en
Stream 2
de
Paired and connected Bluetooth device
Paired Bluetooth device (currently not connected)
Auracast™ Broadcast Audio
Auracast™ technology allows an audio signal from a transmitter (e.g.
tour guide systems in museums, televisions, or public address systems in conference centers) to be transmitted to an unlimited
number of receiving devices (e.g. headphones, hearing aids) located
within a fixed transmission radius. This allows audio data to be
output to multiple output devices simultaneously, such as your own
earbuds and a friend’s earbuds.
Once a transmitter provides Auracast™ audio data, the receiving
device can retrieve information about it. You can use the Smart
Control app to select one of the public Auracast™ channels on your
receiving device and play it. If your earbuds are connected to your
device via Bluetooth, audio will be transmitted to the earbuds.
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Using the earbuds
“Pairing
successful“
“Pairing“
ON
ACCENTUM TW
************
21
34
L
R
3s
3 x
max. 1 m/40 inch
Pairing the earbuds with a Bluetooth device
If you switch on the earbuds for the first time (the pairing list is
empty), they automatically switch to pairing mode.
1. Take both earbuds out of the charging case and insert them into
your ears (> 26). The distance between the earbuds and the Bluetooth device should not exceed 40"/1 m.
2. Simultaneously touch and hold the right and the left touch control
panel for 3 seconds until you hear the voice prompt “Pairing” and
a beep.
The LEDs of the earbuds flash blue and red. The earbuds are in
pairing mode.
3. Activate Bluetooth on your Bluetooth device.
4. Via the menu of your Bluetooth device, start the search for new
Bluetooth devices.
All active Bluetooth devices in the proximity of your device are
displayed.
From the list of found Bluetooth devices, select “ACCENTUM
TW”. If necessary, enter the default pin code “0000”.
If pairing was successful, you hear the voice prompt “Pairing successful” and the LEDs of the earbuds flash blue 3x.
If no connection is established within 2 minutes, pairing mode
is terminated and the earbuds switch to idle mode. If necessary, repeat the steps described above.
If the earbuds are not paired with any Bluetooth device (the
pairing list is empty), pairing mode is permanently active.
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Using the earbuds
Smart Control
“Sennheiser Smart Control”
Installing the Smart Control app
To be able to adjust the settings of the earbuds to your individual
needs and to fully use all functions of the earbuds, you require the
free Sennheiser Smart Control app on your smartphone.
The earbuds can only be paired with Bluetooth devices when
connected to the Smart Control app.
Download the app from the Apple App Store or Google Play and
install it on your smartphone.
– Google Play Store: click
– Apple App Store: click
Alternatively, you can use your smartphone to scan the following QR
code or to call up the following Internet site:
www.sennheiser-hearing.com/smartcontrol
▷ Connect your smartphone to the earbuds via Bluetooth (> 19).
▷ Start the Smart Control app.
▷ Follow the instructions in the app.
Switching the connection to paired Bluetooth devices/“Connections”
To selectively switch the audio connection to paired Bluetooth
devices using the “Connections” function, you require the Smart
Control app (> 22).
▷ In the Smart Control app, tap “Connections”.
The list of Bluetooth devices paired with the earbuds appears.
▷ From the list, select the paired device to which you want to con-
nect the earbuds. Make sure that the desired device is switched
on and Bluetooth is activated.
The Bluetooth audio connection between the desired Bluetooth
device and the earbuds is established.
The app connection between the device with the Smart Control
app installed and the earbuds remains active (only Bluetooth Low
Energy for communication between app and earbuds, the device
name is highlighted in bold).
22 | ACCENTUM True Wireless
Using the “Connections” function, you can also selectively
delete pairing information of devices without resetting the earbuds to the factory default settings.
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Using the earbuds
Disconnecting the earbuds from a Bluetooth device
▷ Via the menu of your Bluetooth device, disconnect the connection
to the earbuds.
The earbuds are disconnected from the Bluetooth device.
The earbuds search for other paired devices. If no device is found,
you hear the voice prompt “No connection”. The earbuds switch
to idle mode.
Using the “Connections” function in the Smart Control app, you
can also selectively connect the earbuds to paired devices
without terminating an existing connection or deleting the pairing information of certain devices (> 22).
If you want to clear the Bluetooth pairing list of the earbuds,
use the Smart Control app or reset the earbuds to the factory
default settings (> 45).
Establishing a connection to Auracast™ transmitters
The “Auracast” function in the Sennheiser Smart Control app allows
you to select and change the connection to an Auracast™ transmitter.
You can connect to several Auracast™ transmitters at the same time.
The transmitter that is currently transmitting audio data is automatically played through your earbud.
▷ Make sure you are within the range of an Auracast™ transmitter.
▷ Make sure that your earbuds are connected to the Smart Control
app (> 22).
▷ On the start screen of the Smart Control app, tap the “Auracast”
section.
The transmitter search menu opens.
You can start an automatic transmitter search or select a transmitter
directly via a QR code.
To start the automatic transmitter search:
▷ Tap the “Start search” button.
The Auracast™ transmitters available within the range are listed.
As long as the “Search” animation is displayed in the menu, the
transmitter search is active.
Some connections to Auracast™ transmitters are subject to
password protection. The corresponding transmitters are
marked with a lock symbol ( ) in the transmitter overview.
▷ In the list, tap the transmitter you want to connect to.
The Bluetooth audio connection to the selected transmitter is
established. The selected transmitter is marked with a blue
tick ( ).
As soon as the transmitter starts an audio transmission, it is
played through your earbuds. The active audio transmission of a
transmitter is indicated by the digital signal symbol ( ).
You can repeat the automatic transmitter search by tapping the
“Search programs” button below the transmitter list.
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Page 24
Using the earbuds
To select an Auracast™ transmitter via a QR code:
▷ Tap the QR code symbol ( ) in the transmitter search menu.
The camera app or a QR scanner app opens on your Bluetooth
device (depending on the model).
▷ Scan the QR code of the Auracast™ transmitter and follow the on-
screen instructions to complete the process.
The Bluetooth audio connection to the selected transmitter is
established. The transmitter appears in the list of available transmitters and is marked with a blue tick ( ).
As soon as the transmitter starts an audio transmission, it is
played through your earbuds. The active audio transmission of a
transmitter is indicated by the digital signal symbol ( ).
When you leave the range of the Auracast™ transmitter, the
connection and audio transmission are interrupted. However,
the transmitter remains subscribed, i.e. as soon as you return
to the range of the transmitter, the connection is re-established
and the audio transmission starts automatically.
During media playback, e.g. when listening to music, the Auracast™ transmission is played with priority. The current playback is muted.
Overview of the symbols when selecting an Auracast™ transmitter
Symbol Meaning/function
Blue tick Auracast™ transmitter connected
Blue digital signal
Lock
QR code
Information
Auracast™ transmitter with active
audio transmission
Auracast™ transmitter with password protection
Auracast™ transmitter search via
QR code
Subscribing to or unsubscribing
from an Auracast™ transmitter
Changing a connection to Auracast™ transmitters
If there is a connection to several Auracast™ transmitters that are
transmitting audio data at the same time, the transmitter that was
last active will be played through your earbuds.
24 | ACCENTUM True Wireless
You can change the transmitter manually.
▷ On the start screen of the Smart Control app, tap the “Auracast”
section.
The transmitter overview opens.
▷ Make sure that a Bluetooth audio connection to the desired trans-
mitter is established and that the transmitter is transmitting
audio data. You can tell by the blue tick ( ) and the digital signal
symbol ( ).
▷ In the list, tap the transmitter you want to play.
The transmitter’s audio data is played through your earbuds.
Page 25
Using the earbuds
Click
LMSXS
Disconnecting from an Auracast™ transmitter
▷ On the start screen of the Smart Control app, tap the “Auracast”
section.
The transmitter overview opens.
Connected transmitters are marked with a blue tick ( ).
▷ Tap on the information symbol ( ) of the transmitter whose con-
nection you want to disconnect and unsubscribe.
The connection to the Auracast™ transmitter is disconnected and
is no longer automatically re-established.
Selecting suitable ear tips for optimum fit of the earbuds
The perceived sound quality including bass performance, the best
possible noise cancellation, the best voice quality for phone calls and
the secure hold of the earbuds in the ears depend to a large extent
on the correct fit of the earbuds. Therefore, you can choose between
silicone ear tips in different sizes.
▷ Pull the ear tip away from the in-ear sound tunnel.
▷ Mount the new ear tip to the in-ear sound tunnel. Ensure that it
locks into place.
▷ Test which ear tip size gives you the best sound quality and the
best wearing comfort.
You can choose between 4 different ear tips in size XS, S, M and
L. The ear tips must fit snugly in the ear canal and completely seal
your ears.
You can use the Fit Test function in the Smart Control app to
test the fit of the earbuds in your ears.
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Page 26
Using the earbuds
RightLeft
L
R
Inserting the earbuds into the ears
▷ Assign the right earbud to your right ear and the left earbud to
your left ear.
▷ Insert the earbuds at a slight angle into the ears and twist them
slightly into the ear canal so that they sit comfortably and snugly
in the ear canal.
The right or left earbud can be used alone. If you insert one
earbud into the charging case during use, a short interruption
of playback may occur in the other earbud.
The Smart Pause function automatically stops music playback
when you remove an earbud from the ear (> 32).
26 | ACCENTUM True Wireless
Page 27
Switching the earbuds on
L
R
“Connected“
“Power On“
WARNING
Danger due to high volume levels!
Listening at high volume levels can lead to permanent
hearing defects.
▷ Before inserting the earbuds into your ears, adjust the
volume to a low level (> 28).
? Do not continuously expose yourself to high volume
levels.
Using the earbuds
▷ Open the lid of the charging case and take out both earbuds.
▷ Insert the earbuds into your ears (> 26).
If a paired Bluetooth device is within the transmission range, you
hear the voice prompts “Power On” and “Connected”. The LEDs
of the earbuds light up blue.
If you take the earbuds out of the charging case during an
incoming call, the call is automatically accepted and you can
use the earbuds directly for making calls.
This Auto Call function can also be deactivated via the Smart
Control app (> 35).
The earbuds automatically switch to idle mode if no paired
Bluetooth device can be found within 15 minutes. You can also
change this setting via the Smart Control app.
You can wake up the earbuds from idle mode by touching their
touch control panels 1x or by briefly inserting them into the
charging case.
ACCENTUM True Wireless | 27
Page 28
Using the earbuds
L
R
Hold R
Hold L
Switching the earbuds off
The earbuds do not have to be switched off.
▷ Insert the earbuds into the charging case and close the lid to
switch them off.
As soon as the earbuds are inserted into the charging case and
the lid of the charging case is closed, the earbuds switch off and
are being charged (> 17).
If you do not close the lid of the charging case, the Bluetooth
connection is briefly interrupted but immediately restored and
the earbuds are being charged.
The earbuds automatically switch to idle mode if no paired
Bluetooth device can be found within 15 minutes.
You can wake up the earbuds from idle mode by touching their
touch control panels 1x or by briefly inserting them into the
charging case.
Adjusting the volume
WARNING
Danger due to high volume levels!
Listening at high volume levels can lead to permanent
hearing defects.
? Adjust the volume to a low level before inserting the
earbuds or changing the audio source.
? Do not continuously expose yourself to high volume
levels.
28 | ACCENTUM True Wireless
To reduce the volume:
▷ Touch and hold the touch control panel of the left earbud until the
volume is reduced.
Page 29
Using the earbuds
To increase the volume:
▷ Touch and hold the touch control panel of the right earbud until
the volume is increased.
When the maximum or minimum volume is reached, you hear the
voice prompt “Volume max” or “Volume min”.
You can also adjust the volume using the connected Bluetooth
device.
If you have activated the voice assistant (> 32) and then change
the volume of the earbuds, the volume of the voice assistant is
adjusted accordingly and saved permanently.
Information on the active noise cancellation ANC
Due to the wearing style in the ear canal, the earbuds provide effective passive isolation from ambient sounds.
In addition, the earbuds are equipped with the active noise cancellation function ANC (“Active Noise Cancellation”), which allows you to
reduce ambient noise to a minimum. Even when ANC is activated,
the sound quality of your earbuds is always at its best.
If you want to create a quiet space in a noisy environment, you can
simply use the earbuds as noise protection by using ANC.
With the Smart Control app, you can select different ANC modes that
provide the optimal settings for your application situation. With
adaptive noise cancellation, the intensity is automatically adjusted
depending on the noise conditions.
Notes on active noise cancellation
• Continuous low-frequency noise, such as motor or fan noise, is
particularly well suppressed.
• Speech or high-frequency noise is significantly reduced, but can
remain perceptible.
• If unusual (whistling or beeping) noise occurs, remove the earbuds from your ears and reinsert them. Make sure that the earbuds properly fit in your ears and make a good seal with the ear
canal.
• To avoid loud, unusual (whistling or beeping) noise and to ensure
proper noise cancellation, do not cover the microphone openings
of the active noise cancellation circuitry located on the outside of
the earbuds.
• With active noise cancellation ANC activated, the battery life of
the earbuds is reduced.
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Using the earbuds
3 x L
ON/OFF
Activating/deactivating the active noise cancellation ANC
▷ Tap the touch control panel of the left earbud 3x.
The active noise cancellation ANC is activated or deactivated.
You can also activate or deactivate the active noise cancellation ANC via the Smart Control app.
During phone calls, the active noise cancellation ANC is always
activated to ensure the best possible voice quality.
Adjusting the active noise cancellation ANC
To be able to adjust the active noise cancellation ANC, you require
the Smart Control app (> 22).
▷ In the Smart Control app, select the desired ANC mode:
ANC mode
activated
deactivated ANC is deactivated
“Anti Wind” Slight reduction to minimize disturbing wind or
*
default setting
*
Reduction of low-frequency noise and
background noise
Maximum reduction of ambient sounds
movement noise
30 | ACCENTUM True Wireless
Page 31
Using the earbuds
1 x L
ON/OFF
Listening to ambient sounds or conversations - activating/deactivating the Transparency Mode
With the Transparency Mode activated, you can hear ambient
sounds or communicate without having to remove the earbuds from
your ears. This allows you to hear e.g. announcements in the train or
aircraft or to have short conversations.
With the Smart Control app, you can adjust the intensity of the
Transparency Mode. This allows you to determine to which extent
ambient noise reaches your ears.
▷ Tap the touch control panel of the left earbud 1x.
The Transparency Mode set in the Smart Control app is activated.
You can hear ambient sounds without having to remove the earbuds from your ears.
To deactivate the Transparency Mode:
▷ Tap the touch control panel of the left earbud 1x.
Adjusting the playback pause in the Transparency Mode
You can select how audio playback behaves when the Transparency
mode is activated. To be able to adjust this setting, you require the
Smart Control app (> 22).
▷ Select the desired setting in the “Transparency Mode” section of
the Smart Control app:
“Automatic Pause” Description
activated*
deactivated
Audio playback (e.g. music) is muted
and you hear only ambient sounds.
Audio playback (e.g. music) continues
and is mixed with ambient sounds.
*default setting
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Using the earbuds
3 x R
ON
Using the voice assistant/voice dialing
▷ Tap the touch control panel of the right earbud 3x.
The available voice assistant of your Bluetooth device is activated
(depending on the system used or app installed: Siri, Google
Assistant or similar).
▷ Speak your request.
To cancel the selection or input to the voice assistant:
▷ Tap the touch control panel of the right or left earbud 2x.
Right touch control panel Function
Tap 3x
If you have activated the voice assistant and then change the
volume of the earbuds (> 28), the volume of the voice assistant
is adjusted accordingly and saved permanently.
Activating a voice assistant
Using the Smart Pause function
The earbuds automatically detect whether they are worn in the ear
or removed from the ear.
Music playback pauses when you remove an earbud from your ear
and resumes when you insert it again (if you interrupt for more than
2 minutes, playback will not start automatically).
You can activate (default setting) or deactivate the function via the
Smart Control app.
32 | ACCENTUM True Wireless
Page 33
Using the earbuds
1 x R
L
2 x
2 x R
Controlling music playback
The music playback functions are only available when the earbuds
and the Bluetooth device are connected. Some smartphones or
music players may not support all functions.
Playing/pausing music
▷ Tap the touch control panel of the right earbud 1x.
Right touch control panel Function
Tap 1x Plays or pauses music
Playing the previous track
▷ Tap the touch control panel of the left earbud 2x.
Left touch control panel Function
Tap 2x Plays the previous track in the playlist
Playing the next track
▷ Tap the touch control panel of the right earbud 2x.
Right touch control panel Function
Tap 2x Plays the next track in the playlist
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Using the earbuds
Making calls using the earbuds
The call functions are only available when the earbuds and the Bluetooth device are connected. Some smartphones and telephony apps
(e.g. WhatsApp, MS Teams, WeChat) may not support all call control
functions.
During a call, you can use the right and/or left earbud
call functions.
Making a call
▷ Dial the desired phone number.
If your Bluetooth device does not automatically transfer the call
to the earbuds, select “ACCENTUM TW” as the output device on
your device (see the instruction manual of your device if necessary).
to control the
Accepting/rejecting/ending a call
If your earbuds are connected to a Bluetooth device and you receive
a call, you hear a ring tone in the earbuds.
If you are playing music when you receive a call, the music pauses
until you end the call.
Right or left touch control
panel
Tap 1x
Tap 2x
Tap 2x
Tap 1x
Tap 2x
Function
Accepts a call
Ends a call
Voice prompt “Call ended”
Rejects a call
Voice prompt “Call rejected”
Accepts an incoming call and ends
the active call
Rejects an incoming call and continues the active call
34 | ACCENTUM True Wireless
Page 35
Using the earbuds
1 x L/R
ON/OFF
Muting the microphones
To mute the earbuds’ microphones during a call:
▷ Tap the touch control panel of the right or left earbud 1x.
You hear the voice prompt “Mute on”.
The microphones are muted.
To activate the microphones again:
▷ Tap the touch control panel of the right or left earbud 1x.
You hear the voice prompt “Mute off”.
The microphones are activated again.
Using the Auto Call function
If you take the paired earbuds out of the charging case during an
incoming call, the call is automatically accepted and you can use the
earbuds directly for making calls.
You can activate (default setting) or deactivate the function via the
Smart Control app. Note that both earbuds must be switched on to
adjust the settings for both earbuds (right and left).
The right or left earbud can be used alone. If you insert one
earbud into the charging case during use, a short interruption
of playback may occur in the other earbud.
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Page 36
Using the earbuds
5s
Displaying the battery charge status
When the earbuds are connected to your Bluetooth device, the battery charge status can be displayed on the screen of your device
(depending on the device and operating system used).
The Smart Control app also displays the charge status of the
rechargeable batteries of the earbuds and the charging case.
Displaying the battery charge status using the charging case
If no USB cable is connected to the charging case or the charging
case is not placed on a wireless charging pad:
▷ Open the lid of the charging case.
The LED display of the charging case indicates the battery charge
status.
If you close the lid of the charging case, the LED display goes off
after 5 seconds.
LED
lights up
green
pulses
yellow
lights up
yellow
lights up
red
flashes
red
Charging case WITH
earbuds inserted
Earbuds are fully
charged, charging
case is more than
50 % charged.
Earbuds are being
charged via the
rechargeable battery of the charging
case.
Earbuds are fully
charged, charging
case is less than
50 % charged.
Rechargeable batteries of the earbuds
and the charging
case are almost
empty.
At least one earbud
has a charging
error/battery error
(> 41).
Charging case
WITHOUT earbuds
inserted
Charging case is
more than 50 %
charged.
–
Charging case is
charged less than
50 %.
Rechargeable battery of the charging
case is almost
empty.
Charging case has a
charging error/battery error (> 41).
36 | ACCENTUM True Wireless
Page 37
Using the earbuds
Adjusting sound effects/the equalizer
To be able to use the sound effects (equalizer), you require the Smart
Control app (> 22).
▷ In the Smart Control app, select the desired sound effects via the
equalizer. You can use predefined presets, define sound modes
(e.g. bass boost) or define your own settings.
The sound effects are stored in the earbuds. The settings are
active even without using the Smart Control app, i.e. when you
are using another Bluetooth device.
Note that both earbuds must be switched on to adjust the settings for both earbuds (right and left).
The Sound Check function of the Smart Control app allows you
to create customized equalizer presets. Sound Check guides
you step by step to the optimal result.
Battery protection mode
When the battery protection mode is activated, the rechargeable
batteries of the earbuds are charged in a particularly protective way
and only up to a charge level of approx. 80 % in order to extend the
battery life. The maximum playback time of the earbuds is reduced
accordingly to approx. 80 % of the standard playback time.
You can activate the battery protection mode via the Smart Control
app (> 22).
Eco mode
Eco mode maximizes the playback time of your earbuds by optimizing energy consumption and can be activated via the Smart Control
app (> 22). This mode can only be used with devices that support
aptX™ transmission.
In Eco mode, the use of the aptX™ Bluetooth codec is deactivated
and audio data is transmitted exclusively via SBC or AAC. This
reduces the transmission bandwidth of the earbuds and increases
the operating time of the battery.
To additionally maximize playback time, it is recommended to also
deactivate the active noise cancellation ANC (> 30) and the Transparency Mode (> 31).
“Low Latency” mode
Your earbuds feature latency compensation as standard. The “Low
Latency” mode can also be used to reduce the latency between the
audio and video signal (e.g. when streaming video on your smartphone) to a minimum.
You can use this mode for all Bluetooth codecs.
If the “Low Latency” mode is activated via the Smart Control app, the
Bluetooth transmission range may be slightly reduced.
ACCENTUM True Wireless | 37
Page 38
Using the earbuds
L
R
Setting the voice prompts/beep sounds
To be able to set the voice prompts and beep sounds, you require the
Smart Control app (> 22).
You can choose between voice prompts and beep sounds, or deactivate the status messages with a few exceptions (e.g. rechargeable
battery is empty). Note that both earbuds must be switched on to
adjust the settings for both earbuds (right and left).
Customizing the control functions
To be able to customize the control functions for music playback, you
require the Smart Control app (> 22).
The app allows you to customize the control functions and other
commands of the earbuds, to select preset control functions or to
switch off the control functions. Some basic functions cannot be
changed (e.g. call control).
Storing or transporting the earbuds in the charging case
ATTENTION
Moisture and dirt can damage the electronics of the charging case
and the earbuds!
If moisture and dirt get inside the charging case, this can impair its
function.
▷ Do not place the earbuds in the charging case when they are wet
or dirty.
Store the earbuds in the charging case to prevent damage to the earbuds when not in use or during transport. The earbuds are automatically charged in the charging case so you always have the full battery life to work with.
▷ Open the charging case by overcoming a slight magnetic resis-
tance and insert the left earbud into the left charging compartment and the right earbud into the right charging compartment.
The earbuds are magnetically pulled into the charging compartments.
▷ Close the lid of the charging case.
38 | ACCENTUM True Wireless
Page 39
Care and maintenance of the earbuds/charging case
ALCOHOL
Care and maintenance of the
earbuds/charging case
CAUTION
Liquids can damage the electronics of the product!
Liquids entering the housing of the product can cause a short-circuit
and damage the electronics.
? Keep all liquids far away from the product.
? Do not use any solvents or cleansing agents.
▷ Only clean the charging case with a soft, dry cloth.
▷ Clean the earbuds with a slightly damp cloth.
If you notice that the sound quality of the earbuds is deteriorating
due to clogging:
▷ Remove the ear tips from the earbuds’ in-ear sound tunnels.
▷ Using a dry, clean brush (e.g. toothbrush), lightly brush over the
in-ear sound tunnel openings to remove any dirt above the protective fabric. Avoid damaging the protective fabric within the inear sound tunnels to prevent dirt or debris from entering the electronics.
▷ You can clean the silicone ear tips under lukewarm running water.
Allow the ear tips to dry at room temperature for at least 12 hours
before re-attaching them to the earbuds.
ACCENTUM True Wireless | 39
Page 40
Care and maintenance of the earbuds/charging case
▷ Clean the charging contacts on the earbuds and in the charging
case from time to time, e.g. with a cotton swab.
To remove any dirt such as dust accumulation or lint from the USB
socket of the charging case:
▷ Blow into the USB socket or carefully brush a fine object (e.g. a
toothpick or the bristles of a toothbrush) through the opening of
the socket.
If the earbuds have gotten wet:
▷ Remove the ear tips and dry the earbuds and ear tips with a dry
cloth. If necessary, allow the earbuds and ear tips to dry at room
temperature for approx. 12 hours.
40 | ACCENTUM True Wireless
Page 41
Care and maintenance of the earbuds/charging case
Click
Replacing the ear tips
For reasons of hygiene, you should replace your ear tips from time to
time. Replacement ear tips can be found on the ACCENTUM True
Wireless product page at www.sennheiser-hearing.com
You can use the Fit Test function in the Smart Control app to
test the fit of the earbuds in your ears.
▷ Pull the ear tip away from the in-ear sound tunnel.
▷ Mount the new ear tip to the in-ear sound tunnel. Ensure that it
locks into place.
.
Information on the built-in rechargeable battery
Sonova Consumer Hearing ensures and guarantees that the
rechargeable batteries perform at their optimum upon purchase of
the product. If, upon purchase or within the warranty period, you suspect that a rechargeable battery is obviously defective or if a
charging error/battery error is displayed (> 8), stop using the product, disconnect it from the power supply system and contact your
Sonova Consumer Hearing partner. Your Sonova Consumer Hearing
partner will coordinate the repair/replacement with you.
Do not return a product with a defective battery to your dealer or
Sonova Consumer Hearing partner unless requested to do so. To find
a partner in your country, search at
www.sennheiser-hearing.com/service-support
At the end of its operational lifetime, this product with its built-in
rechargeable battery must be disposed of separately from normal
household waste. You can find more information here: > 49.
In the Smart Control app, you can activate the battery protection mode, which ensures gentle charging and thus longer battery life (> 37).
.
ACCENTUM True Wireless | 41
Page 42
Care and maintenance of the earbuds/charging case
Installing firmware updates
Firmware updates are available free of charge. You can download
them from the Internet using the Sennheiser Smart Control app.
▷ Make sure that the rechargeable batteries are fully charged
before updating (> 17).
▷ Take the earbuds out of the charging case before updating and do
not reinsert them into the charging case during the update.
▷ Connect your earbuds to your smartphone and start the Smart
Control app (> 22).
The app provides information on available firmware updates and
guides you through the installation process.
▷ Avoid connecting or disconnecting the USB power supply during
the update process.
42 | ACCENTUM True Wireless
Page 43
FAQ/If a problem occurs ...
FAQ/If a problem occurs ...
If a problem has occurred, proceed in the following order until the
problem is solved and you can use the earbuds again:
1. Insert the earbuds into the charging case and close the lid. Wait
for at least 10 seconds (> 44).
2. Connect the earbuds to the Smart Control app to install the latest
firmware (> 42).
3. Reset the earbuds to the factory default settings (> 45).
4. Check the list of frequently asked questions to see if there is a
solution to the problem (> 43).
5. Contact your Sonova Consumer Hearing partner to solve the
problem (> 43).
Current list of frequently asked questions (FAQ)
Visit the ACCENTUM True Wireless product page at
www.sennheiser-hearing.com
There you will find a current list of frequently asked questions (FAQ)
and suggested solutions.
Your question has not been answered or the problem persists?
If a problem occurs that is not listed in the FAQ section or if the problem cannot be solved with the proposed solutions, please contact
your Sonova Consumer Hearing partner for assistance.
To find a partner in your country search at
www.sennheiser-hearing.com/service-support
Leaving the Bluetooth transmission range
Wireless calling and streaming are only possible in the Bluetooth
transmission range of your smartphone. The transmission range
largely depends on environmental conditions such as wall thickness,
wall composition etc. With a free line of sight, the transmission
range of most smartphones and Bluetooth devices is up to 10 meters.
If you, and therefore the earbuds, leave the Bluetooth transmission
range of your Bluetooth device, the sound quality deteriorates
increasingly until you hear the voice prompt “No connection” and the
connection breaks down completely. If you immediately re-enter the
Bluetooth transmission range of your device, the connection is automatically re-established and you hear the voice prompt “Connected”.
If this is not the case, tap the touch control panel of one earbud 1x.
If you are using Auracast™ and you leave the radio range of the Auracast™ transmitter with your Bluetooth device, the connection and
audio transmission will also be interrupted. If you re-enter the range
of a previously paired Auracast™ transmitter, the Bluetooth wireless
connection is re-established and the audio transmission starts automatically.
.
The Bluetooth transmission is also affected if you have activated a special audio transmission mode for your earbuds. The
“Low Latency” mode can cause a reduced transmission range.
ACCENTUM True Wireless | 43
Page 44
FAQ/If a problem occurs ...
10s
L
R
Resetting the earbuds
If the function of the earbuds is disturbed, perform a reset. Individual
settings such as the pairing settings are not deleted.
▷ Insert the earbuds into the charging case and close the lid.
After 10 seconds, the earbuds will restart (reset).
44 | ACCENTUM True Wireless
Page 45
FAQ/If a problem occurs ...
15s
1
3
2
4 5
OFF
15s
Connected
15s
Resetting the earbuds to the factory default settings
If the function of the earbuds is disturbed and a reset (> 44) does not
improve, reset the earbuds to the factory default settings. This
deletes, among other things, all pairing settings (> 46).
The easiest way to reset the earbuds to the factory default settings
is using the Smart Control app.
Alternatively, you can manually proceed as follows:
1. Disconnect all existing connections between Bluetooth devices
and your earbuds, e.g. by deactivating Bluetooth on the devices.
If you are connected to an Auracast™ transmitter, disconnect it
via the Smart Control app (> 25).
2. Insert one earbud into the charging case and close the lid of the
charging case. The second earbud remains in the charging case.
3. Touch and hold the touch control panel of the earbud that is not
in the charging case for 15 seconds.
The LED on this earbud alternately lights up green and red (peer
pairing mode).
4. Take the second earbud out of the charging case.
5. Touch and hold the touch control panel of the second earbud for
15 seconds.
The LED on this earbud alternately lights up green and red (peer
pairing mode).
Both earbuds connect to each other within 15 seconds.
The earbuds are successfully reset to the factory settings and
paired.
▷ Reconnect your earbuds to your Bluetooth device (> 21) or an
Auracast™ transmitter (> 23).
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FAQ/If a problem occurs ...
1 2
20s
Connected
Keep open
3 x
L
R
Pairing a spare earbud with another earbud
The right and the left earbud are paired with each other upon delivery. If, however, you are using a different earbud (e.g. a spare earbud), you have to pair the two earbuds with each other once. This
pairing process resets the earbuds to the factory default settings.
1. Place both earbuds back into the charging case.
2. Leave the charging case open.
After 20 seconds, the earbuds are paired with each other.
The LED on the charging case then lights up red and green 3x.
The earbuds are now paired with each other.
If you have closed the lid of the charging case too early, repeat
the above procedure.
After the pairing process with a spare earbud, all settings are
reset. Pair the earbuds with your Bluetooth device again (> 21).
46 | ACCENTUM True Wireless
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Specifications
Specifications
ACCENTUM True Wireless
Model: ATW1, ATW1 R, ATW1 L, ATW1 C
Wearing style True Wireless stereo earbuds
Ear coupling ear-canal
Frequency response 5 Hz to 21 kHz
Transducer principle dynamic
Transducer size 7 mm
Sound pressure level (SPL) 107 dB (1 kHz/0 dBFS)
THD (1 kHz, 94 dB SPL) < 0.08 % (1 kHz/94 dB)
Noise cancellation Hybrid ANC technology
Microphone principle MEMS
Microphone frequency
response
Microphone pick-up pattern (speech and ANC)
Power supply built-in lithium rechargeable batter-
Charging method via
charging case
Operating time 8 hrs with rechargeable battery of the
Charging time of rechargeable batteries
Temperature range operation: 0 to +40 °C
Relative humidity operation: 10 to 80 %, non condensing
100 Hz to 10 kHz
2 microphones per earbud
beamforming array for active noise
cancellation
ies:
earbuds (R and L): 3.7 V , 55 mAh,
0.2 Wh
charging case: 3.7 V ,
400 - 420 mAh, 1.48-1.56 Wh
input:
earbuds (R and L): 5 V ,
max. 55 mA
charging case: 5 V , max. 500 mA
output:
earbuds (R and L): none
charging case: 5 V ,
max. 55 mA x 2 (R and L)
USB charging via USB-C socket:
5 V , 500 mA;
Qi wireless charging
earbud
28 hrs with rechargeable battery of
the charging case
(test conditions: smartphone within
1 m distance, Bluetooth AAC codec,
volume level 50 %, ANC off)
approx. 1.5 hours for full charge
approx. 10 minutes for 1 hour of music
playback
charging: +5 to +35 °C
storage: –20 to +60 °C
storage: 10 to 90 %
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Specifications
Magnetic field strength earbuds: 53.7 mT
charging case: 101.7 mT
Ingress protection of the
earbuds
splash proof (IP54)
Weight earbuds: approx. 5.5 g each
charging case: approx. 41 g
both earbuds and charging case:
approx. 52 g
Bluetooth
Version Bluetooth 5.3 certified, class 1
Transmission frequency 2,402 MHz to 2,480 MHz
Modulation GFSK, π/4 DQPSK, 8DPSK
Profiles AVRCP, A2DP, HFP, TMAP, PBP
Output power 10 mW (max.)
Codec aptX™, AAC, SBC, Auracast™ Broad-
cast Audio, LC3
Device name ACCENTUM TW
Number of active connec-
2
tions
48 | ACCENTUM True Wireless
Page 49
Manufacturer declarations
Manufacturer declarations
Warranty
Sonova Consumer Hearing GmbH gives a warranty of 24 months on
this product.
For the current warranty conditions, please visit our website at
www.sennheiser-hearing.com/warranty
Consumer Hearing partner.
In compliance with the following requirements
• General Product Safety Directive (2001/95/EC)
•Compliant to Sound Pressure Limits according to country specific requirements
EU declaration of conformity
• RoHS Directive (2011/65/EU)
Hereby, Sonova Consumer Hearing GmbH declares that the radio
equipment type ATW1 (ATW1 R, ATW1 L, ATW1 C) is in compliance
with the directive 2014/53/EU.
The full text of the EU declaration of conformity is available at the following Internet address:
www.sennheiser-hearing.com/download
or contact your Sonova
.
UK declaration of conformity
• RoHS Regulations (2012)
•Radio Equipment Regulations (2017)
Notes on disposal
• EU: WEEE Directive (2012/19/EU)
• EU: Battery Directive (2006/66/EC & 2013/56/EU)
• UK: WEEE Regulations (2013)
• UK: Battery Regulations (2015)
The symbol of the crossed-out wheeled bin on the product, the battery/rechargeable battery (if applicable) and/or the packaging indicates that these products must not be disposed of with normal
household waste, but must be disposed of separately at the end of
their operational lifetime. For packaging disposal, observe the legal
regulations on waste segregation applicable in your country.
Improper disposal of packaging materials can harm your health and
the environment.
The separate collection of waste electrical and electronic equipment, batteries/rechargeable batteries (if applicable) and packagings is used to promote the reuse and recycling and to prevent negative effects on your health and the environment, e.g. caused by
potentially hazardous substances contained in these products.
Recycle electrical and electronic equipment and batteries/rechargeable batteries at the end of their operational lifetime in order to make
contained recyclable materials usable and to avoid littering the environment.
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Manufacturer declarations
If batteries/rechargeable batteries can be removed without damaging them, you are obliged to dispose of them separately (for the safe
removal of batteries/rechargeable batteries, see the instruction
manual of the product). Handle lithium-containing batteries/
rechargeable batteries with special care, as they pose particular
risks, such as the risk of fire and/or the risk of ingestion in the case
of coin bat terie s. Redu ce the g enerat ion of battery was te as mu ch as
possible by using longer-life batteries or rechargeable batteries.
Further information on the recycling of these products can be
obtained from your municipal administration, from the municipal collection points, or from your Sonova Consumer Hearing partner. You
can also return electrical or electronic equipment to distributors who
have a take-back obligation. Herewith you make an important contribution to the protection of the environment and public health.
Trademarks
Apple, iPhone, the Apple logo and Siri are trademarks of Apple Inc.,
registered in the U.S. and other countries. App Store is a service
mark of Apple Inc. The trademark “iPhone” is used in Japan with a
license from Aiphone K.K.
Google Play and the Google Play logo are trademarks of Google LLC.
The Bluetooth® word mark and logos are registered trademarks
owned by Bluetooth SIG, Inc. The Auracast™ word mark and logos
are trademarks owned by the Bluetooth SIG, Inc. Any use of such
marks by Sonova Consumer Hearing GmbH is under license.
Qualcomm® aptX™ is a product of Qualcomm Technologies International, Ltd. Qualcomm is a trademark of Qualcomm Incorporated,
registered in the United States and other countries, used with permission.
aptX™ is a trademark of Qualcomm Technologies International, Ltd.,
registered in the United States and other countries, used with permission.
The Qi logo is a trademark of the Wireless Power Consortium.
Other product and company names mentioned in the user documentation may be the trademarks or registered trademarks of their
respective holders.
50 | ACCENTUM True Wireless
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