2 Pieces digital FM transmitter module FM transmitter stereo frequency modulation DSP PLL 76.0 -108.0MHz multi-function frequency modulation with LCD display LINE/USB/MIC Input DC 3.0v-5.0v

User-defined settings:
Setting about the backlit LED mode:
After turning off the power, press and hold the up and down radio buttons at the same time to turn on the phone. B1 means that the backlight is always on, and B0 means that the backlight is off for 20 seconds. The settings will take effect after restarting. (The factory default setting is to turn off the backlight after 20 seconds)
2.Turn on/off campus broadcast frequency band:
When turning off the power, press and hold the "VOL +", "VOL-" keys and turn on the power C1 on the LCD display to turn on the campus broadcast, and turn off C0 to turn off the campus broadcast, the setting will take effect after restarting. (The factory default setting is to close the campus broadcast frequency band)
3. Settings of stereo/mono transmission mode:
There are 2 solder joints M and G on the back of the module. The short connection is a single tone transmission, and the disconnection of these 2 points is the start of the stereo system. (The factory default is stereo system startup).

Specifications:
Power supply voltage: DC 3.0v - 5.0v
Output Power: 100mW
Equivalent noise: >=30dB
Operating current: 35mA
Modulation mode: standard FM
Adaptive antenna: 75 cm bar antenna
Transmission frequency: 88.0~108.0 MHz
Frequency response range: 50~18 KHz
Sound track: line/USB channel (stereo); Mic channel (single channel)
Transmission frequency: 76.0~108.0 MHz (campus broadcast: 76.0~87.0 MHz)
Frequency adjustment stepping: 0.1 MHz/ times (short press the key); 1.0 MHz/ times (long press the key)

Package includes:
2 x Digital FM transmitter module

Note:
The stereo system must meet the input stereo requirements of the module