Detailed Product DescriptionBluetooth performance standard: Support 
Headset and Handsfree profile 
Two 
Earphone Stereo music enjoyable 
Transmitter power: Class 2 
Wireless frequency: 2.4 GHz-2.480 GHz 
Sensitive: < -75 dBm 
Transmitter distance: 10M 
Power Parameter 
Charger power: Input 100-240V AC, OUTPUT 5V DC 
Working volt: 3.7V 
Battery: Rechargeable Li-Polymer battery 
Charging time: 2.5 hours 
Talking time: 3 hours 
Standby time: 80 hours