Version:Build V4.2
transmission frequency:2.4GHz
Talk time: limitless
Standby time:limitless
Charging time: No need
Working Current:22mA
Standby Current:1mA
Input interface：USB stereo
Cable length：120cm
Function: Control Volume and Calling Music Previou/Next/Pause/Start
Drive: Φ10mm
Sensitivity: 96dB±3dB
Impedance: 32Ω±15%
Frequency Response: 20-20KHz