Universal Bluetooth car hands free apply to all Bluetooth mobile phone (fully compatible with GSM / CDMA / T DMA / W-CDMA Bluetooth mobile telephone ) Modern design remote controller on the steering wheel English phonebook function, can remember up to 200 telephone records Figure the eliminate noise and Echo System Easy to redial/dial back/take/reject/hung up the call High-power amplifier speakers Direct high sensitive microphone Voice dial-up function Re-connect automatically Automatically change to the private talking when you take the earphone 12V Power supplied by Car cigarette, 2000mAh rechargeable battery A2DP function for music cell phone SD interface for Mp3 function FM transfmitter function for full frequency LCD screen can display the incoming call name and telephone number Specification: Power supply: 12V Working current: 25mA Working distance: 10-15m Bluetooth solution: BC3 FM Frequency range: 88.1~107.9MHz Microphone response: -49dB Working time: up to 80hours.