Weight: 7g
Running time: call 4.5h, listen to music 4h
Bluetooth: BT 4.1
Effective distance: 10m
Color: black, white
Imprint method: silk screen
Charging 1-2 hours, standby time up to 100 hours
Bluetooth version 4.1, more power than the 3.0 version, more stable
Voice-activated to answer the phone call, the real liberation of your hands