1.Mode switch, single press to switch modes
2.Next song/Volume+: At the USB/TF card mode, short press to play the next music long press to increase the volume.
3.Previous song/Volume-: At the USB TF card mode, short press to play the previous music long press to decrease the volume
4. Play/Pause:
1At the card mode, single press to enter play pause function
2At the USB card mode, single press to enter play/pause function
3At the TF card mode, single press to enter play/pause function
5.TF card jack
6.USB charging jack: Red LED light indicates it
is in charging state. The light is off if charging is full.
7.Líne-in jack
8.ON/OFF
9.USB card jack