BOROFONE BC21 Business Bluetooth Headset Wireless Earphone with Mic

1. Bluetooth V4.2 JL AC6973
2. Material: ABS
3. Charging voltage DC5V; charging time: about 1.5 h
4. Battery capacity: 70mAh
5. Call/music time: 4 h; standby time 120 h
6. Size: L55 × W15 × H20mm; Weight: 9g
7.Voice prompt switch：When not connected, double-click the multi-function button and there will be a beep