Features:
1. Backward , press long"-" to lower volumn;
2. Forward, press long"+" to increase volumn;
3. Micro SD(TF) card set;
4, Recharge, usb connection;
5. On /Off;
6. Pause if press "play"button short, change to FM mode if press "play"button long;
7. Musice effect mode;
8. Light work status: RED light on when charging, no light when battery full. BLUE light flash slowly when play music;
Flash quickly when on FM searching status;