S7

Bluetooth version : 4.2 （FR 4.2)                                                

Speaker driver size : 10mm
Impedance : 18Ω±10%
Frequency response : 20Hz-20KHz
Max. Input power : DC5V
Sensitivity :102±3dB
Battery :70mA
Charging time(PC/Laptop) : 0.2hr
Playback time :3.5-4hr