VTB-100 Bluetooth specification:2.0 range:0-10m .Independent FM wireless earpiece to protect your privacy. .Answer and end a call,reject a call,call waiting,redial and voice dial. .Super bright LCD caller No. and english name display. .DSP technology to suppress noise and echo. .Rechargable battery(built-in l600MA) .USB faucet for software updating. .Triangle appearance,and easy to install-just mount over the sunvisor