Good performance: thanks to the DSP and PLL technology, these multi-functional stereo FM transmitter modules can provide you with quality stereo Practical design: the FM transmitter module has a blue backlit LCD display, allowing you to clearly see the value in a dark environment; The power consumption is extremely low, and noise interference is small Suitable for: this digital FM transmitter supports line/USB/mic audio channel input, its transmitting frequency range is 76.0 to 108.0 MHz, and the frequency response range is from 50 Hz to 18 KHz; Frequency adjustment stepping is 0.1 MHz/ times when short press the key and 1.0 MHz/ times for long press Wide uses: the digital FM transmitter module can be applied to FM wireless audio, USB PC audio broadcast, maternal and monitoring, wireless microphone and much more Warm notice: please confirm whether the power polarity and power voltage are correct before turning on the power; If the input voltage exceeds 5V or the positive and ne