Specification:
Specification: Bluetooth V2.0
CPU: BlueCore3-Audio
Wireless frequency: 2402MHz to 2481MHz
Transmitted power: Class 2(MAX 4dBm)
Received Sensitivity: -77dBm
Charging power sourcing: 100v-240v

Working voltage: 3.7v
Battery: Rechargeable Li-ion 120mAh
Charging time: about 120 minutes
Talking time: Continue 4hours, stereo music 2.5-3 hours
Standby time: 70 hours
Range: 10 meters