Solution: jianrong
Bluetooth V4.1+EDR
Transmission distance: 10 meters usage time: 4 hours
Standby time: 120 hours
Battery: 85mAh rechargeable lithium battery
Functions: to adjust the volume, switch songs, answer calls, reject calls, hang up the phone, bluetooth play, replay, bluetooth hands-free calls, phone back to even, voice prompt, capacity display, intelligent power off, take function