VTB-66 Bluetooth soccer .Bluetooth specification:1.2 range:0-10m .Complete bluetooth wireless installation. .DSP technology to suppress noise and echo. .Voice dialing,last call redialing and call waiting function. .Built-in high intelligent microphone and powerful speaker. .With high capacity lithium battery to provide typical standby time of 240hrs,talking time of 15hrs .Light weight,easy carrying to anywhere for using,such as use in car,office and home.