Silvercrest SFR 2.4 B1 User Manual [en, pl, de]
English .............................................................................................................. 2
Polski ............................................................................................................. 26
Deutsch ........................................................................................................... 50
v 1.45
SilverCrest SFR 2.4 B1
Table of Contents
Introduction ...................................................................................................... 4
Intended Use .................................................................................................... 4
Package Contents ............................................................................................. 5
Technical Specifications .................................................................................... 6
Non-Compliant Radio Tuner Frequency Bands ............................................................................... 7
Safety Instructions ............................................................................................ 7
Warning: Mains Isolation ................................................................................................................ 7
Risks Associated With High Noise levels ......................................................................................... 8
Operating Environment ..................................................................................................................... 8
Children .............................................................................................................................................. 8
Conventional and Rechargeable Batteries ...................................................................................... 9
RF Interface ........................................................................................................................................ 9
Connectors and Controls ................................................................................. 10
Headphones ................................................................................................................................... 10
Transmitter cradle (Back Panel) ..................................................................................................... 11
Transmitter cradle (Front Panel) ..................................................................................................... 11
Transmitter cradle (Bottom) ............................................................................................................ 12
LED Indicators on the Headphones ............................................................................................... 12
Transmitter cradle LED Indicators .................................................................................................. 13
Before Getting Started.................................................................................... 14
Connecting the Transmitter Cradle ................................................................................................ 14
Charging the Battery of the Wireless Headphones ..................................................................... 15
Getting Started ............................................................................................... 16
Powering the Headphones On/Off .............................................................................................. 16
Selecting the Operating Mode ..................................................................................................... 16
Powering the Transmitter Cradle On ............................................................................................. 16
Powering the Transmitter Cradle Off ............................................................................................. 17
Synchronising the Headphones and Transmitter Cradle ............................................................. 17
Adjusting the Volume ..................................................................................................................... 18
Receiving Radio Stations ................................................................................ 18
Using the Headphones with a Cable ............................................................... 19
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Battery Operation .......................................................................................... 19
Powering the Headphones Using Batteries .................................................................................. 20
Powering the Transmitter Cradle Using Batteries ......................................................................... 21
Troubleshooting ............................................................................................. 22
Maintenance / Cleaning ................................................................................. 23
Environmental Considerations and Recycling ................................................. 23
Conformity ..................................................................................................... 23
Warranty and servicing information .............................................................. 24
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SilverCrest SFR 2.4 B1
Introduction
Thank you for choosing a SilverCrest product.
These SilverCrest Wireless Headphones SFR 2.4 B1 have been designed for receiving wireless
high-quality stereo sound from audio playback devices. The range of the wireless signals is up to
85 m (255 ft) outdoors and 25 m (75 ft) indoors under optimum conditions, depending on the
environment. The device also features an FM radio receiver.
Intended Use
This device is a consumer electronics device. The SilverCrest Wireless Headphones have been
designed for cable-free transmission of audio signals. Furthermore, the Wireless Headphones
feature a radio function. They may only be used for private use, not industrial or commercial
purposes. The device may not be used outdoors or in tropical climates. Only external devices that
comply with safety standards and are compatible with this device in terms of electromagnetic
compatibility and shielding may be used. This device fulfils all relevant norms and standards
associated with CE Conformity. Any unauthorised modifications to the device may result in these
directives no longer being met, and the manufacturer will not be liable for any damage or injury
resulting from unauthorised modification. Only use the accessories recommended by the
manufacturer.
Please observe the regulations and laws in the country of use.
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SilverCrest SFR 2.4 B1
Package Contents
Wireless headphones SFR 2.4 B1 Transmitter cradle
Power adapter Taiytech TYTE70500050EU
Audio cable, 2m (6,5 ft), 3.5 mm stereo jack to
3.5 mm stereo jack
Audio cable, 4m (13,1 ft),
3.5 mm stereo jack to 3.5 mm stereo jack
Adapter,
3.5 mm stereo jack socket to 6.3 mm
stereo jack
Adapter cable 3.5 mm stereo jack socket to 2x
Cinch plugs
User's manual (not shown)
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SilverCrest SFR 2.4 B1
Technical Specifications
Model Wireless stereo headphones SFR 2.4 A1 with FM radio
Frequency response 22 - 20,000 Hz
Signal to noise ratio 50 dB
R/L channel separation 30 dB
Carrier frequency 2.40 – 2.48 GHz (WLAN hopping)
Modulation digital
Maximum transmission power 9.9 dBm
Radio tuning band FM Radio 87.5 MHz to 108 MHz
Transmission range up to 85m (255 ft) under optimum conditions
Broadband characteristics
voltage
Connectors and ports 1 x stereo Audio-In 3.5 mm jack (headphones)
Power supply Power adapter (for transmitter cradle)
Rechargeable battery/battery
operation
Operating temperature 5 to 40 °C (max. 90 % rel. humidity)
Storage temperature 5 to 40 °C (max. 90 % rel. humidity)
Weights
(without batteries)
Dimensions
(W x H x D)
327 mV
1 x stereo Audio-In 3.5 mm jack (transmitter)
1 x 5V DC-In
Manufacturer: Taiytech
Type EU: TYTE70500050EU
Type UK: TYTE70500050UK
Input: 100-240VAC, 50/60Hz, 0.2A
Output: 5V
Rechargeable Lithium-Ion battery,
3.7V, 900 mAh (built-in in headphones)
Alternative power supply for headphones: 2x AAA R03/LR03
batteries (not included in the package)
Alternative power supply for transmitter cradle: 3x AAA
R03/LR03 batteries (not included in the package)
Headphones: 275 g
Transmitter cradle: 143 g
Transmitter cradle: 120 x 245 x 118 mm
Headphones: 205 x 200 x 85 mm
, 500 mA
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SilverCrest SFR 2.4 B1
Non-Compliant Radio Tuner Frequency Bands
The technical design of the device may allow a frequency band outside the permitted frequency
band limits to be received in certain countries. In some countries, different local regulations may
apply for the assigned broadcasting frequency bands. Please note that you are not allowed to
process, pass to third-parties or in any form use any information that you receive outside the
assigned broadcasting band.
Safety Instructions
Before you use this device for the first time, please read the following notes in this manual and
heed all warnings, even if you are familiar with handling electronic devices. Keep this manual
safe for future reference. If you sell the device or pass it on, it is essential that you also hand over
this manual.
This symbol indicates important information for safe operation of the device and the
safety of the user.
This symbol indicates other important information on the topic.
Warning: Mains Isolation
The On/Off switch of this device does not fully disconnect the device from the mains. Furthermore,
the device consumes electricity in the Standby mode. In order to completely disconnect the device
from the mains, the power adapter must be pulled out from the wall outlet. For this reason, the
device should be positioned such that unobstructed access to the wall outlet is ensured, so that the
power plug can be immediately pulled out in an emergency situation. To avoid the risk of fire if
the device is not going to be used for a long while (e.g. during holidays), it should always be
disconnected from the power socket.
Do not open the housing of the power adapter - it contains no serviceable parts! Opening the
housing exposes you to lethal electric shocks.
Before stormy weather when there is the risk of lightning, disconnect the device from the power
supply.
Use only the original power adapter. For more information, please see “Power supply” on page
6.
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SilverCrest SFR 2.4 B1
Risks Associated With High Noise levels
Exercise caution when using headphones. Listening at high volume can damage
your hearing.
In accordance with safety regulations the maximum permitted noise level is 100 dB(A). The
device fully complies with these legal requirements.
Do not use the headphones at high volume levels, otherwise you will damage your hearing and
possibly disturb other people. In dangerous situations, e.g. on the road or when operating
machines, do not use the headphones. Although the device is designed to enable you to perceive
external noise, never adjust the volume to such a high level that you are not capable of hearing
what is happening around you.
Operating Environment
Position the device on a stable, flat surface and do not place any objects on the device. The
device is not designed for use in environments with high temperatures or humidity (e.g.
bathrooms), and must be kept free of dust. Operating temperature and operating humidity: 5 °C
to 40 °C, max. 90% RH
Always make sure that:
no direct heat sources (e.g. radiators) can affect the device;
the device is not exposed to direct sunlight or artificial light;
contact with spray, dripping water and corrosive liquids is avoided and the device is never
operated near water, in particular the device may never be immersed in liquids (do not place
any objects containing liquids, such as vases or drinks, near the device);
the device is never placed in the immediate vicinity of magnetic fields (e.g. loudspeakers);
no fire hazards (e.g. burning candles) are placed on or near the device;
no foreign bodies are introduced into the device;
the device is not subjected to extreme temperature changes.
the device is not subject to excessive shocks and vibrations;
Children
Electrical devices do not belong in the hands of children. Do not allow children to use electrical
devices when not under supervision. Children may not always recognize potential hazards.
Batteries and small parts represent potential choking hazards. Keep batteries out of the reach of
children. If a battery is swallowed, seek medical help immediately. Keep the packaging away
from children too as there is a risk of suffocation.
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SilverCrest SFR 2.4 B1
Conventional and Rechargeable Batteries
These headphones use a built-in rechargeable Lithium-Ion battery. The rechargeable battery may
only be removed or replaced by an authorized service centre.
Insert the batteries with the correct polarity. Refer to the polarity markings inside the battery
compartment. Do not try to recharge the batteries and do not throw batteries into the fire. Do not
mix battery types (old and new or carbon and alkaline, etc.). Remove the batteries when the
device is not to be used for a long time. Improper use may cause explosions and danger to life.
Respect the environment. Old batteries do not belong in the domestic waste.
They must be handed in to a collection point for waste batteries.
RF Interface
Turn the device off when onboard an aircraft, in a hospital, in an operating theatre or in the
vicinity of medical electronic equipment. The RF signals may interfere with the functionality of
sensitive devices. Place the device at least 20 cm (8 inches) away from pacemakers, as the RF
signals may interfere with the functionality of the pacemaker. The transmitted RF signals can cause
interference with hearing aids. Do not place the device with the wireless adapter turned on near
flammable gases or in a potentially explosive area (e.g. a paint shop), as the transmitted RF
signals may cause explosions or fire.
The range of the radio wave signals depends on environmental conditions. When data is
transmitted via a wireless connection it may also be received by unauthorized parties. The
manufacturer is not liable for any interference caused to RF or TV signals as a result of
unauthorized modifications to this device. Furthermore, the manufacturer does not assume any
liability for replacing any cables or devices that have not been specifically approved by the
manufacturer. The user is solely responsible and liable for troubleshooting any interference
caused by unauthorized modification of this device and for replacing appliances.
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SilverCrest SFR 2.4 B1
Connectors and Controls
Headphones
1 Charger connection
2 Radio and RF signal reception indicator
3 PAIRING (Synchronise headphones with transmitter cradle)
4 Volume control
5 SCAN (Search for radio station)
6 FM – WL (Mode selection switch)
7 Headphones audio input socket
8 Headphones power indicator
9 ON/OFF (Headphones On/Off button)
10 Power source DC1/DC2 selection switch
11 Removable ear cushion pad with battery compartment
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SilverCrest SFR 2.4 B1
Transmitter cradle (Back Panel)
12 On/Off button for transmitter cradle send mode
13 "PAIRING" synchronisation button
14 Transmitter cradle audio input socket
15 Power socket
Transmitter cradle (Front Panel)
16 Transmitter cradle charging connection
17 Transmitter cradle send indicator (AUDIO)
18 Transmitter cradle power and charging indicator (POWER)
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SilverCrest SFR 2.4 B1
Transmitter cradle (Bottom)
19 Battery compartment
LED Indicators on the Headphones
The headphones have two LED indicators: the power indicator (8) and the radio and RF signal
reception indicator (2). The following table contains a description of their meaning depending on
their colour and status:
LED indicator Status Description
Power indicator
(8)
Reception
indicator (2)
On, orange The headphones are powered on.
Off The headphones are powered off.
Blinking, green Attempting to establish a connection with the
transmitter cradle.
On, green The RF link to the transmitter cradle has been
established or a broadcasting station has been
found.
On, orange The RF link to the transmitter cradle has been
established. However, the transmitter cradle is not
receiving an audio signal from an external audio
source (e.g. your hi-fi equipment).
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SilverCrest SFR 2.4 B1
Transmitter cradle LED Indicators
The transmitter cradle has two LED indicators: the power/charging indicator POWER (18) and the
RF send indicator AUDIO (17). The following table contains a description of their meaning
depending on their colour and status:
LED indicator Status Description
AUDIO (17) Blinking, green Attempting to establish a connection with the
headphones.
On, orange There is a transmission fault from the external audio
source (e.g. your hi-fi equipment) to the transmitter
cradle.
On, green A connection to the headphones has been
established and audio data is being sent to the
headphones.
POWER (18) On, orange The headphones battery is being charged. If the
battery is fully charged, the indicator changes to
green again.
On, green The transmitter cradle is powered via the power
adapter.
Off The transmitter cradle is not powered via the power
adapter.
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SilverCrest SFR 2.4 B1
s
Before Getting Started
Connecting the Transmitter Cradle
To connect to hi-fi equipment, use one of the supplied audio cables (see page 5 – “Package
Contents”).
1. Connect one end of the audio cable to the audio input socket (14).
2. Connect the other end of the cable to the headphones output socket of your hi-fi equipment.
If your hi-fi equipment has a 6.3 mm jack socket, connect the adapter plug (see page 5 –
“Package Contents”) to the audio cable.
You may also connect the adapter cable (see page 5 – “Package Contents”) to the cable to
use the Cinch audio outputs of your hi-fi equipment.
3. Plug the small plug at the cable end of the mains adapter into the power socket (15).
4. Plug the power adapter into a wall outlet.
5. Turn on the transmitter cradle. See page 16 – “Powering the Transmitter Cradle On”.
As soon as you connect the power adapter to the transmitter cradle and the
mains, the transmitter cradle power indicator (18) lights up green. This i
independent of the position of the On/Off switch (12).
Only use the power adapter indoors.
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Charging the Battery of the Wireless Headphones
Please charge the battery before using the product for the first time. A charging cycle takes
approx. four hours.
Connect the power adapter to the transmitter cradle and to a wall outlet (see page 14 –
“Connecting the Transmitter Cradle”).
1. Place the headphones onto the cradle as shown below. The charging contacts (16) of the
transmitter cradle must touch the charging contacts of the headphones (1).
The power and charge indicator (18) of the transmitter cradle will light up orange while the
battery is charging. When the charging process is completed, the power and charge
indicator will light up green.
If you place the headphones onto the transmitter cradle while they are
switched on, they will be switched off automatically.
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SilverCrest SFR 2.4 B1
Getting Started
Powering the Headphones On/Off
If the battery level of the headphones is high enough (the power and charge indicator (18) on the
transmitter must light green), you may remove the headphones from the transmitter cradle.
You may optionally power the headphones using conventional batteries. For more information,
see the information on page 19 – “Battery Operation”.
1. Press the On/Off button (9) of the headphones once to switch them on. The power indicator
(8) will light up orange.
2. Keep the On/Off button (9) on the headphones pressed for a few seconds to switch them
back off. The power indicator (8) then goes out.
Please remember to set the correct position for the Power source DC1/DC2
selection switch (10). When set at DC2 position, the device will power on only
if charged batteries have been inserted into the headphones. Please also see
page 20 – “Powering the Headphones by Using Batteries”.
In wireless mode, if no audio signal is received for 5 minutes, the headphones
switch off automatically. You will have to switch the headphones on again
next time you use them.
Selecting the Operating Mode
1. Slide the mode selection switch (6) to the “WL” position to use the wireless headphones to
listen to an external audio source (e.g. your hi-fi equipment).
2. Slide the mode selection switch (6) to the “FM” position to receive your favourite FM radio
programmes.
Powering the Transmitter Cradle On
1. To power the transmitter cradle on, slide the On/Off switch (12) to the “ON” position.
After powering on, the send indicator (17) blinks green. This indicates that the transmitter
cradle is attempting to establish a connection with the headphones. See also the description
on page 17 – “Synchronising the Headphones and Transmitter Cradle”.
Synchronising the transmitter cradle and the headphones can take a while.
If no audio signal is received, the transmitter cradle automatically disconnects
the RF link after 10 minutes. Once the audio signal is reactivated, the RF link is
restored automatically.
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SilverCrest SFR 2.4 B1
Powering the Transmitter Cradle Off
You may power the transmitter cradle off whenever it is not needed. When powered off, it will not
transmit any RF signals but the headphones battery will still be charged.
1. Slide the On/Off switch (12) on the transmitter cradle to the “OFF” position. The send
indicator (17) on the transmitter goes out.
You may optionally power the transmitter cradle using conventional batteries. For more
information see page 21 – “Powering the Transmitter Cradle Using Batteries”.
Synchronising the Headphones and Transmitter Cradle
After powering the headphones and the transmitter cradle on, both devices should synchronise
automatically. This process may take a while (sometimes more than 1 minute), but normally you
just have to be patient.
Under unfavourable circumstances, however, the audio signal may be subject to interference. This
may happen if you are using a baby phone or a wireless keyboard and mouse set nearby. In this
case you can synchronise the devices manually to locate an interference-free channel.
1. Power the transmitter cradle on by sliding the On/Off switch (12) on the transmitter cradle to
the “ON” position.
2. Power on the connected audio source and start playback. The send indicator (17) on the
transmitter cradle should light up green.
3. Slide the mode selection switch (6) of your headphones to the “WL” position.
4. Power the wireless headphones on by pressing the On/Off button (9) once.
5. Press and hold the synchronisation button (3) of the headphones and the synchronisation
button (13) of the transmitter cradle for at least 1 second.
The RF reception indicator on the headphones (2) and the send indicator on the transmitter
cradle (17) start blinking. As soon as both devices have synchronised, both indicators will
light up green.
6. If necessary, repeat step 5 if you are not satisfied with the reception quality or you still have
interference from other devices.
Synchronising the transmitter cradle and the headphones can take a while. If
there are many wireless devices nearby using the 2.4 GHz RF technology, the
transmitter cradle and headphones first have to find a free communications
frequency. Any frequencies that are already occupied by other devices will
not be used. This is also known as “WLAN Skipping and Hopping”.
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SilverCrest SFR 2.4 B1
Adjusting the Volume
Turn the volume controller (4) into the + direction to increase the sound volume, or turn it to the direction to lower the volume.
If you have connected your headphones to an external audio source, you may also adjust the
volume directly on the audio source (e.g. by using the remote control of your hi-fi equipment).
However, please remember that many audio devices provide a constant signal level on their
Cinch audio outputs, thus not allowing a volume adjustment when using this type of connection.
Receiving Radio Stations
You may change the operating mode of your headphones to FM radio reception at any time.
1. Power the headphones on by pressing the On/Off button (9) once. The power indicator (8)
will light up orange.
2. Slide the mode selection switch (6) of your headphones to the “FM” position. The radio
reception indicator (2) will not light up if no radio station has been tuned-in. It will light up
green as soon as a station has been properly tuned in.
3. Press the SCAN button (5) on the headphones once to search for the next available station.
During radio station scanning the radio reception indicator (2) will blink green.
4. Each press of the SCAN button (5) will find the next available station until the end of the FM
band has been reached. After this the scan will automatically continue from the beginning of
the FM band.
The FM signal reception depends on environmental conditions. If the desired station cannot be
received without noise or interference, try changing your location.
The last tuned-in station will not be saved when changing the operating mode or after powering
the headphones off.
To use the built-in FM tuner it is not necessary to power the transmitter cradle on. You may turn it
off by pressing the On/Off button (12).
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SilverCrest SFR 2.4 B1
Using the Headphones with a Cable
If your location is close to the audio source and you don’t wish to make portable use of your
headphones, you may use them with a normal cable connection. In this case you don’t need the
wireless capabilities of the transmitter cradle.
For cable operation, use one of the supplied audio cables (see page 5 – “Package Contents”).
1. Music output via the audio cable is possible while the headphones are powered off. To save
battery power, press the On/Off button (9) to power the headphones off.
2. Connect one end of the audio cable to the audio input socket (7) of your headphones.
Connect the other end of the cable to the headphones output socket of your hi-fi equipment.
If your hi-fi equipment has a 6.3 mm stereo socket, connect the adapter plug (see page 5 –
“Package Contents”) to the cable.
You may also connect the adapter cable (see page 5 – “Package Contents”) to the cable to
use any of the Cinch audio outputs of your hi-fi equipment.
With this type of connection, the headphones work as a passive device. The
volume adjustment on the headphones is restricted. You will need to adjust the
volume on the audio source.
Switching to radio reception is not possible during cable operation. If you
want to listen to radio stations, you must first disconnect the connection cable
from the audio input socket (7) of your headphones.
Battery Operation
You may power both the transmitter cradle and the headphones using conventional batteries.
Batteries are not included in the package.
Remove the batteries when the device is not to be used for a long time.
Respect the environment. Old batteries do not belong in the domestic waste.
They must be handed in to a collection point for waste batteries.
Rechargeable AAA batteries cannot be recharged when inserted into the
device.
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SilverCrest SFR 2.4 B1
Powering the Headphones Using Batteries
The headphones battery compartment is located in the left earpiece.
1. Power the headphones off. To do this, keep the On/Off button (9) pressed for a few seconds.
2. Hold the left ear pad with your left hand. Using your other hand, carefully turn the ear pad
clockwise and remove it (see the following figure).
The ear cushion is fixed on a plastic frame. You need to remove this frame
from the locking mechanism together with the ear cushion. Do not pull on the
ear cushion itself.
3. Insert two AAA batteries into the earpiece battery compartment. Make sure you match the
correct polarity. Note the + and – icons on the batteries and inside the battery compartments.
4. Slide the function switch (10) to the “DC2” position to switch to battery mode.
5. Place the ear cushion onto the earpiece so that the locking noses of the plastic frame are
inserted into the corresponding notches on the earpiece. Then turn the ear pad carefully
counter-clockwise until it clicks into place.
To switch between conventional batteries and internal rechargeable battery operation you must
select the proper position with the function switch (10).
Position "DC1" represents internal rechargeable battery operation
Position "DC2" represents conventional battery operation
Pay attention to the proper setting of the function switch. If no batteries are
inserted and you have left the function switch at the “DC2” position, the
headphones will not power on.
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SilverCrest SFR 2.4 B1
Powering the Transmitter Cradle Using Batteries
The transmitter cradle battery compartment (19) is located on the bottom.
1. Remove any cable connections and turn the transmitter cradle upside down, holding it in your
hand.
2. Open the battery compartment by sliding the lock of the compartment cover into the direction
of the compartment. The cover can be opened and then removed.
3. Insert three AAA batteries into the battery compartment. Note the + and – icons on the
batteries and inside the battery compartment.
4. Place the battery compartment cover over the battery compartment so that the locking nose of
the cover is inserted into the corresponding notch on the transmitter cradle. Then close the
battery compartment cover until it locks in place.
If you have inserted batteries into the transmitter cradle and you connect the
power adapter to the power socket (15), battery operation will be disabled
automatically. This helps you to save battery power whenever the device is
connected to the mains via the power adapter.
While the transmitter cradle is on battery power, it will not charge the built-in
headphone battery.
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