Retekess TR104 FM Headphone User Manual
Product schematic diagram
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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
：①
Do not use this product in a flammable or explosive environment (such as gas stations, steam rooms, etc.).
②
Do 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
