Jrifedptry RDA5807 2 Channel Stereo FM Radio Module FM Receiver Board 76.0MHz-108.0MHz

2. Short the F- button to search for the radio downwards. After searching the station, it stop and play the station. and hold the F- button and the receiving frequency is decremented by 0.1MHz. 4. Short the V- button to decrease the volume by one level, the minimum level is 0 (mute). and hold the V- button to turn it off. Instructions: 1. Short the F+ button to search for the station upwards. After searching the station, it stop and play the station. and hold the F+ button and the receiving frequency is incremented by 0.1MHz. 3. Short the V+ button, the volume increase by one level, and the maximum volume position is 8. and hold the V+ button to restore the factory default parameters, frequency 99MHz, volume level 6 . 5. After shut down, any key to turn it on.