Features: Connect with compatible Bluetooth mobile phone for making or receiving calls Enjoy high fidelity music from your mobile/PDA/MP3 and any Bluetooth audio source cordlessly Bluetooth V1.2 Class2 (10 meters coverage) specification Support A2DP (Advanced Audio Distribution Profile ) and AVRCP (Audio/Video Remote Control Profile) Build-in high quality microphone 150 hours stand-by, 6 hours music playing, 3 hours talking time Build-in Li-Polymer rechargeable battery Flexible ear loop and lightest design for long time listening    Specifications Solution                      : CSR Bluetooth Specification : V1.2 Class 2 (10 meter coverage) Frequency : 2.402 - 2.480 GHZ, GFSK Support Profiles : Support Bluetooth HSP (Head Set Profile), HFP (Hand Free Profile), A2DP (Advanced Audio Distribution Profile ) 　 　 and AVRCP (Audio/Video Remote Control Profile) USB Interface : For charging battery only Stand-by time : 150 hours Music playing time : 6 hours Talking time : 6 hours Charging time : ~ 3 hours Power supply : Build-in Li-Polymer rechargeable battery Control buttons : On/Off, Volume +/-, Play/Pause, Forward/Backward Frequency response : 20 HZ-20 KHZ Sensitivity : <0.1% BER at -80dBm RF output power : -6dBm to 4dBm Operating temperature : -10C to +55c Power consumption : 30-40mAh Input voltage : + 5V DC Giftbox : TBC Carton box : TBC Unit weight : 40g (Including Battery) Dimensions : Ø40, Folded: 126 x 70 x 40(mm) Certifications : CE / FCC / BQB 　 Packages included: BT08-001 Bluetooth Stereo headset with microphone USB Cable User Manual