Sennheiser Momentum True operation manual
MOMENTUM True Wireless
True wireless stereo earphones
M3IETW (M3IETW L, M3IETW R, M3IETW C)
Instruction manual
Use the search function, the navigation (left) or the following links: Start
“Product overview” “Getting started” “Using the earphones”
“FAQ/If a problem occurs ...” “Specifications”
Sennheiser electronic GmbH & Co. KG
Am Labor 1 30900 Wedemark Germany
www.sennheiser.com
Version: 08/18 A01
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 an obviously defective product.
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 headphones are used at high volume levels for long periods of time. Sennheiser
headphones sound exceptionally good at low and medium volume levels.
Do not insert the earphones too deep into your ears and never insert them without ear adapters. Always remove the earphones slowly and carefully from your ears.
The product generates stronger permanent magnetic
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 special attention (e.g. in traffic or when performing skilled jobs).
Preventing damage to the product and malfunctions
Always keep the product dry and do not expose it to extreme temperatures (hairdryer, heater, extended exposure to sunlight, etc.) to avoid corrosion or deformation.
Use only attachments/accessories/spare parts supplied or recommended by Sennheiser.
Clean the product only with a soft, dry cloth.
Safety instructions for Lithium rechargeable batteries
WARNING
If abused or misused, the rechargeable batteries may leak.
In extreme cases, they may even present a risk of
•explosion,
•fire development,
•heat generation,
•smoke or gas development.
2 | MOMENTUM True Wireless
Important safety instructions
Only use rechargeable batteries and chargers recommended by Sennheiser.
Charge products with built-in rechargeable batteries at ambient temperatures between 10 and 40°C/50 and 104°F.
Do not heat above 60 °C/140°F, e.g. do not expose to sunlight or throw into fire.
When not using the product for extended periods of time, charge its built-in rechargeable battery regularly (about every 3 months).
Switch rechargeable battery-powered products off after use.
Dispose of defective products with built-in rechargeable batteries at special collection points or return them to your specialist dealer.
Notes on data collection and processing and on firmware updates
This product stores individual settings such as the volume, the sound profiles and the Bluetooth addresses of paired devices. This data is required for the operation of the product and is not transferred to Sennheiser or companies commissioned by Sennheiser 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 Sennheiser servers in order to provide and transfer suitable firmware updates: MAC address, Bluetooth Low Energy UUID, Bluetooth name of the product, firmware version of the product and version of the app. The data will only be used as specified and will not be stored permanently.
If you do not want this data to be transferred and processed, do not connect to the Internet.
Intended use/Liability
These headphones have been designed as an accessory for Bluetooth compliant devices. They are intended for wireless audio communication such as music playback and phone calls via Bluetooth wireless technology.
It is considered improper use when the product is used for any application not named in the corresponding product documentation.
Sennheiser does not accept liability for damage arising from improper use or misuse of this product and its attachments/accessories.
Sennheiser is not liable for damages to USB devices that are not consistent with the USB specifications. Sennheiser is not liable for damages resulting from the loss of connection due to flat or overaged rechargeable batteries or exceeding the Bluetooth transmission range.
Before putting into operation, please observe the respective coun- try-specific regulations.
MOMENTUM True Wireless | 3
Package contents
Package contents
Earbud R for right ear (M3IETW R) and earbud L for left ear (M3IETW L)
Charging case with built-in rechargeable battery for the earbuds (M3IETW C)
USB charging cable with USB-C and USB-A connector, approx. 0.25 m
Silicone ear adapters (size XS, S, M (pre-mounted to the earphones) and L
Quick guide
Safety guide
Online you can find:
•this detailed instruction manual and additional information (www.sennheiser.com/download)
•the Sennheiser Smart Control app for configuring the headphones and for additional functions (www.sennheiser.com/device-control-app)
A list of accessories can be found on the MOMENTUM True Wireless product page at www.sennheiser.com. Contact your local Sennheiser partner: www.sennheiser.com > “Service & Support”.
4 | MOMENTUM True Wireless
Product overview
Product overview
Charging case
M3IETW C
7
6 8
9
1 2 3 4 5 
7
LED
displays the charging process/charge status of the rechargeable battery of the charge case or of the earbuds (when inserted into the charging case)
Input for USB-C connector
for charging the rechargeable batteries
LED button
activates the LED display for 5 seconds
Built-in rechargeable battery for charging the earbuds on the go
Type plate
Charging compartment for the left earbud L
Magnetic holders
Charging compartment for the right earbud R
Charging contacts
MOMENTUM True Wireless | 5
Product overview
Earbuds
M3IETW L and M3IETW R
M3IETW L |
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M3IETW R |
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B |
G |
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A |
C |
C |
A |
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L |
R |
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0 |
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0 |
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D E D |
D E |
D |
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H |
H |
F |
F |
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F |
Touch control panel
Changeable silicone ear adapters
Left earbud L (slave earbud, receives signals from the right earbud)
Status LED
Magnetic holders
Charging contacts
Microphones for the perception of ambient noise (“Transparent Hearing”) and for phone calls
Right earbud R (master earbud, controls the Bluetooth connection to the smartphone and to the left earbud)
Built-in rechargeable battery
Overview of the LED indications of the charging case
2
When a USB cable is connected, the LED of the charging case permanently displays the charging process:
6 | MOMENTUM True Wireless
Product overview
LED |
Charging case WITH |
Charging case |
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WITHOUT earbuds |
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earbuds inserted |
inserted |
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pulses |
... earbuds and char- |
... charging case is |
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yellow |
ging case are being |
being charged |
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charged |
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lights up |
... earbuds and char- |
... charging case is |
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green |
ging case are fully |
fully charged |
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charged |
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... a charging error/ |
... a charging error/ |
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flashes |
battery error has |
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battery error has |
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been detected in at |
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red |
been detected in the |
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least one earbud |
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charging case (> 26) |
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(> 26) |
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2
Press
1x
If you press the LED button and no USB cable is connected, the LED of the charging case displays the battery charge status or the charging process of the earbuds for 5 seconds:
LED |
Charging case WITH |
Charging case |
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WITHOUT earbuds |
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earbuds inserted |
inserted |
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lights up |
... earbuds are fully |
... charging case is |
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charged between |
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green |
charged |
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50-100 % |
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... earbuds are being |
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pulses |
charged via the |
– |
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rechargeable bat- |
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yellow |
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tery of the charging |
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case |
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... rechargeable bat- |
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lights up |
tery of the charging |
... charging case is |
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case is empty and |
charged less than |
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yellow |
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the earbuds are not |
50 % |
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fully charged |
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... rechargeable bat- |
... rechargeable bat- |
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lights up |
teries of the earbuds |
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red |
and the charging |
tery of the charging |
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case is empty |
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case are empty |
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... a charging error/ |
... a charging error/ |
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flashes |
battery error has |
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battery error has |
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been detected in at |
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red |
been detected in the |
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least one earbud |
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charging case (> 26) |
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(> 26) |
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MOMENTUM True Wireless | 7
Product overview
If the LED does not light up, the rechargeable battery is deep discharged. Charge the rechargeable battery until the LED lights up again (> 12).
Overview of the LED indications of the earbuds
LED |
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Meaning; the earbud ... |
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flashes red-blue |
... is in Bluetooth pairing mode |
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for approx. 1 min |
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3x |
flashes blue 3 |
... Bluetooth pairing successful |
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times |
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3x |
flashes red 3 |
... Bluetooth pairing failed |
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times |
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... is connected to a device via Blue- |
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lights up blue |
tooth |
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(master earbud (R) is connected to |
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the smartphone, slave earbud (L) is |
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connected to the master earbud (R)) |
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... is not connected to a device via |
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Bluetooth or the connection has |
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lights up red |
been lost |
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(master earbud (R) is not connected |
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to a smartphone, slave earbud (L) is |
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not connected to the master earbud |
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(R)) |
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flashes red |
... rechargeable battery is almost |
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quickly |
empty |
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flashes red |
... system error. Perform a restart (> |
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slowly |
28). |
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When you insert the earbuds into your ears, the LEDs of the earbuds automatically go off after approx. 5 seconds.
8 | MOMENTUM True Wireless
Product overview
Notes on voice prompts
The earphones output voice prompts for the following functions. Using the 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/earbuds... |
“Power on” |
... are switched on |
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“Power off” |
... switch off |
“Connected” |
... connected via Bluetooth |
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“No connection” |
... not connected via Bluetooth |
“Pairing” |
... is in Bluetooth pairing mode |
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“Pairing cancelled” |
... Bluetooth pairing cancelled |
“Pairing successful” |
... Bluetooth pairing successful |
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“Pairing failed” |
... Bluetooth pairing failed |
“Recharge headset” |
... rechargeable battery almost |
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empty – recharge the battery |
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“Call rejected” |
... incoming call rejected |
“Call ended” |
... call ended |
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“Volume min” |
... volume set to minimum |
“Volume max” |
... volume set to maximum |
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MOMENTUM True Wireless | 9
Getting started
Getting started
1. Waking up the earphones and the charging case and charging the rechargeable batteries
Upon delivery, the rechargeable batteries of the earphones and the charging case are in sleep mode and have to be woken up by connecting them to a power source once.
Insert the earphones into the charging case.
Connect the USB-C cable to the charging case and to a USB power source (> 12).
The earphones and the charging case are woken up and the rechargeable batteries are being charged. The earphones are now ready for use.
2. Installing the Smart Control app on your smartphone
The Sennheiser Smart Control app allows you to use all functions and settings of the earphones and to e.g. adjust the sound to your liking using the equalizer (> 15).
10 | MOMENTUM True Wireless
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