... Stereo Bluetooth headset,bluetooth earphone,bluetooth headphone ·Hardware version: Rev.R03·Bluetooth specification: Bluetooth 1.2 compliant·Supported profile: A2DP, AVRCP, headset, hands free ... specification THD: 0.1%·Quality: 44.1, 48kHz 16bit stereo CD quality·Sensitivity: 96dB·Frequency response: 20Hz - 20kHz·Codec ... time: 1.5 - 2hrsStereo Bluetooth headset,bluetooth earphone,bluetooth headphone