Retekess TR104 FM Headphone User Manual
Product schematic diagram
M bu on/st aons stora ge a nd play
- bu on
+ buon
Display sc reen
Pow er bu on/M ode sw itc hing
3.5mm A udio input ja c k
Operation instructions
1. Power supply: First install 2 AAA batteries。
2. Power on and off：Press and hold the power button for 3 more seconds to turn it on, and press it again to turn it off.Every time you turn it
on, it is in FM mode.
3. Automatic search：In FM mode,press and hold “+” or “-” for 2 more seconds to start searching for the station automatically forward or
backward. After searching for the station, it will stop automatically.
4. Manual fine-tuning：In FM mode, click the power button and the last digit of the display frequency will begin to flash,and click "+" or "-" to
step forward or backward in 0.1MHz steps.
5. Volume adjustment：In FM mode,click the "+" or "-" button to turn up/down the volume.
6. Mode switching：Click the power button, the whole machine rotates in three modes: FM/Manual fine adjustment.
7. Stations storage：In FM mode,press and hold the “M” key for 2 more seconds, the system will store the current station. At this time, the
LCD will display the stored channel number (01-08) and flash 3 times. The current station is redisplayed after the flashing is completed.A
total of 8 channels can be stored, and when the memory is refilled, the 01 channel starts to be overwritten.Unplug the battery and remove
all stored stations.
8. Reading station：In FM mode,click the “M” button to read the stored station directly.Press the “M” button again to select a stored station.
9. Wired headset function：In the off state, there is no need to install a battery. Connect the headphones and audio output device with a
3.5mm audio cable, which can be used as a wired headset.（Note: Audio cable is sold separately）
Technical Parameters
1. Frequency range: FM 50-108MHz 2. Sensitivity：FM >8uV
3. Number of stations stored: 8 4. Speaker specifications: 32Ω 250MW
5. Output power: ≥20MW 6. Working current: FM≤65MA
7. Shutdown and standby current: ≤65uA 8. Power: 2 x AAA battery(not included)
Common problems and solutions
cannot turn on：
1. Please make sure if the positive and negative terminals of the battery installed correctly.
2. Whether the battery has electricity. The brightness of the display reflects the level of power.
3. Press and hold the key for three seconds to turn it on.
Headphones noise：
1. Replace the battery.
2. Tested in places where the signal is strong or empty. The dormitory signal is weak and the interference is too strong.
3. When using it as a wired headset, turn off the unit or unplug the battery.
Only have sound on one side：
In the wired state, whether the jack is in place exactly.
How to clear an saved station：
Unplug the battery.
Note：①Do not use this product in a flammable or explosive environment (such as gas stations, steam rooms, etc.).
②Do not use in thunderstorms.Thunderstorms can cause equipment to malfunction and increase the risk of lightning strikes.
③ Remove the battery for 7 days without using it to avoid leakage of the product.
EU Importer: Germany Retevis Technology GmbH
Address: Uetzenacker 29,38176 wendeburg
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