Version:  5.1
Support Bluetooth protocols: A2DP,AVRCP,HFP,HSP
Working distance: 10 meters
Talk time:  6 hours above
Standby time: 120 hours above
Headset parameters:
Materials: Plastic
Speaker: 40 mm
Impedance: 32 Ω
Sensitivity: 108dB
Frequency response: 20-20 KHZ