1. Bluetooth version: Bluetooth 3.0
2. BT name: BT Audio
3. Frequency range: 2.402GHZ--2.480GHZ
4. Bluetooth distance: 20-30 meters
5. Intercom distance: 500 meters
6. Lithium battery capacity: 3.7V/850MAH
7. Charging interface: Micro USB Android universal plug
8. Charging voltage: 5V
9. Working time: 10 hours
10. Charging time: about 2.5 hours
11. Standby time: about 200 hours
12. Charging current: 400 mA
13. Working temperature: -10 degrees -55 degrees
14. Storage temperature: -20 degrees -60 degrees
