Description
1. ON/OFF
2. Battery charging DC-5V
3. U disk playback
4. TF card playback
5. AUX(audio input)
6. ( M ) Short press: modes switch
7. (-4) A short click for the last song, long press to reduce the volume
8. (L*+) A short click for the next song, long press to increase the volume
9. (HI) Short press: play/pause
