1. Touch-sensitive buttonsPlay stereo music from any A2DP sourceAux line in for portable music players, 
2. Dual track 
3. Built-in stereo Bluetooth transfer technology 
4. Detachable and rechargeable battery, up to 8 hour music playing time 
5. Functions: - Switch on / off, Pairing Transfer stereo music from any A2DP source or other portable music players, volume adjustment 
6. Power: 2.5W*2 
Material: ABS Plastic 
Size: L*W*H=140*65*30 (mm) weight: 171g.