Bluetooth headset  Features:1)  Stereo Bluetooth Headset with back-hang style2)  Wireless enjoy stereo music and calls3)  Have voice dialing4)  Suitable for mobile phones, PDA and PC5)  Soft earwearing enable user comfortable6)  When listen to music, it automatically mutes with each incoming call and continue after hang up Specification:1)  Hardware Version: Rev.R032)  Bluetooth specfication: Bluetooth 1.2 compliant3)  Supported profile: A2DP, AVRCP4)  Power class: classII5)  Frequency Range: 2402-2480 MHz6)  Spread spectrum: FHSS (79 channels) USA/EU7)  Modulation: GFSK (Gaussian frequency shift keying)8)  Interoperability: support the Bluetooth A2DP, AVRCP and HS/HF profiles9)  Security: Pairing, encryption and authentication10)  Frequency response: 20Hz-20kHz11)  Input power: AC100-240V12)  Output: DC 5V,1A13)  Dimension: 144mm*135mm* 66mm14)  Weight: 80g