Transmission range: 10 meters
Function: Battery display, voice control, call function, support music, multi-point connection
Bluetooth protocol: 4.2
Channel: Stereo
How to use : Over the ear
Single button battery: 80 mA Three button battery: 100 mAh

technical parameter:
1, Bluetooth version: V4.2+EDR compatible with V4.0, V3.0, V2.1, V1.1
3, transmission power: Class2
4, transmission frequency: 2.4GHz
5, transmission distance: 10 meters
7, talk time: 6-8 hours
8, play time: 4-6 hours
9, standby time: 120 hours
10, support file formats: IOS, A2DP, AVRCP, HSP and HFP

11: The product does not need to be in the ear, it can clearly play music and call