Bluetooth 3.0+EDR       OR CSR Bluetooth 4.0                                                                                                                                          
Power supply : USB
Frequency: 90Hz-20KHz
SNR ≥ 85dB 
Distortion Factor: ≤0.5%
Impedance: 4ohm
Output Power : 2*5W
Charge: USB /DC5V audio cable port
Input DC voltage: DC5.0V
Housing Material : ABS+PC                               
Waterproof(IPX7) ,Dust-Proof, Drop resistance                            
Support more than 10 hours playing with built in 2500mah li-battery