... TECHNICAL SPECIFICATION: 1. Receiving and sending distance: 10 meters. 2. Bluetooth specification: V2.1+EDR 3. GFSK(Gaussian Frequency shift keying ... )4. Bluetooth could connect 1.0,1.1,1.0 and 2.0 firmal mobilephone, such as Iphone etc5 ... . Bluetooth profiles supported: HSP,HFP,A2DP,AVRCP6. ...