M-618 Bone Conduction Hanging Ear Stereo Bluetooth Headset(Black)

1. Bluetooth version: V5.12. Speaker: bone conduction vibrator speaker3. Battery capacity: 170mAh4. Life time: about 12 hours5. Charging time: 2 hours6. Bluetooth distance: about 15 meters7. Support functions: music play, pause. Incoming calls are answered, but rejected. Ios battery display, automatic connection, call siri voice assistant, etc., caller ID.8. Headphone size: 6.7×5.2x1cm