Magnetic absorption wireless bluetooth headset (V4.2 bluetooth chip) Bluetooth version: version 4.2 Transmission distance: the outdoor linear distance is 10 meters Battery capacity: polymer lithium battery 55mah Music time: 2.5 hours for up and down/pause Call time: 2.5 hours Standby time: 130 hours Charging time: 1-2 hours Pairing mode: long press to turn on the red and blue light flash is pairing mode Key function: long press to start up, long press to shut down, click music to pause/play/answer/hang up the phone, double-click the next song.