Bluetooth specification:2.0; range:0-:10 m Easy to installation and just clip to the sun visor Independent FM wireless earpiece to protect your secrets Up and Down button to check the number who call you Super bright LCM caller english name display Complete blue tooth wireless installation DSP technology, Full duplex, noise and echo suppression. With 1600mAh Lithium battery to provide typical standby time of more than 168 hours talking time of 11 hours and headset talking time of 5 hours Voice dialing, last call redialing, and call switching function. Built-in high intelligent microphone and powerful speaker. USB faucet to software framework update and charge.