Stereo Bluetooth headset,bluetooth earphone,bluetooth headphone ·Hardware version: Rev.R03·Bluetooth specification: Bluetooth 1.2 compliant·Supported profile: A2DP, AVRCP ... Gaussian frequency shift keying)·Interoperability: all devices support the Bluetooth A2DP, AVRCP and HS/HF profiles·Security: pairing ... hours·Charging time: 1.5 - 2hrsStereo Bluetooth headset,bluetooth earphone,bluetooth headphone