*Stereo Mode,Stylish patent design *Auto mute on headphone *comfortable for long ... Pairing, and Minimal InterferenceSPECIFICATION: Bluetooth VersionV2.1 +EDRChipsetCSRBluetooth Profile SupportedHeadset, Handsfree, A2DP and AVRCPOperation Range10mFrequency2.4GHz spectrumTalking Time15 hoursMusic Playing Time6 ...