Features: Fixed on the steering wheel with special hool structure which is convenient for fixing and operationDSP technoloy,full duplex,CVC noise and echo suppresionSupport TTS functionSupport MIC mute functionAnswer/end/reject a call,last call redialing,and call switchSupport A2DP function,can play cell phone music and control it completely via Bluetooth car kitBuilt-in high intelligent microphone and powerful speaker in order to keep excellent sound quality effectsBuilt-in Li-ion BatteryUSB port for software update and chargeConnect automatically when power is onSupport dual standby Specifications: Bluetooth version:2. 1Bluetooth working Frequency:2. 4GHzReceiving range of the Bluetooth device:0~10 metersTalking range of the hands-free Mic:0~1 metersCharging voltage: 5VCapacity of the built-in lithium: 300mahExternal size(LxWxH):98x45x22. 5mmWeight: 160gOperating temperature: -10~70CStorage temperature: -20~80CMaterial: ABSColor:black key word:car MP3,vehicle-mounted MP3,bluetooth,FM transmitter,ABS