Tech. Spec.
1) Standard: Bluetooth V1.2
2) Chipset: BlueCore4-audio single chip
3) Compatibility: General headset and Bluetooth cell phone
4) Radio performance: Class 2
5) Carrier frequency: 2.4-2.480GHz
6) Rx sensitivity: ≤80dBm
7) Spread spectrum: 10 meters

Description
1) Charger: Input 220V AC, output 5V DC
2) Working volt: 3.7V
3) Battery: Rechargeable Li-polymer inside
4) Charging time: 2-5hrs
5) Talking time: 6hrs
6) Standby: 130hrs