:
Press to increase the volume
Volume - :
Press to decrease the volume
Previous track :
In Bluetooth mode, click to play last music.
In Micro SD card mode, click to play last song, hold on to fast reverse.
In Aux mode, this button is invalid.
Next track:
In Bluetooth mode, click to play next track.
In Micro SD card mode, click to play next track, hold on to fast forward.
In Aux mode, this button is invalid.
4) Remote Controller
