Product Specification  1.Model Number:K6  2.Charging means:power adapter output(DC5V 100mA)  3.Battery: High-capability rechargeable lithium polymer battery.  4.Wireless Operation:Class 2  5.Porfiles Supported: Headset?handfree ?A2DP/AVRCP/APTX  6.Talking time : Up to 7 hours  7.Playing time: Up to 9 hours  8.Stand By time: up to 200 hours.  9.Charging time : about 2 hours  10. Bluetooth version :4.0Packing :  1* Bluetooth headphone  1* USB charging cable  2* Earhook  1* User Manual Website: