The rearview mirror hands free car kit is a wireless device that utilises the latest bluetooth technology to communicate with your mobile phone within a 10-metre range. This allows you to talk through its built-in high quality loudspeaker and external high sensitivity microphone without the need to hold the phone or take your hands off the steering wheel. Universal bluetooth hands free car kit for all kind of bluetooth phone. (Compatible with all kinds of gsm/cdma/tdma/w-cdma bluetooth phones.) Features: 1) Rearview mirror type 2) 12 digit caller id (phone with handsfree profile required) 3) Digital noise & echo cancellation system 4) High powered amplifier and speaker 5) Directional high sensitive microphone 6) Voice dialling, redial and call transfer function 7) Possible to make firmware upgrade by usb 8) Automatic re-connection 9) Loudspeaker mute button 10) Easy set up and simple operation 11) Modern & elegant design 12) Provides the best sound clarity with little or no distortion. (superior sound quality) 13) Using battery or DC 12V 14) Display using LED or VFD Detailed Product Description 1) Bluetooth specification: 1.2 2) Built-in microphone and loudspeaker 3) Super bright LED display panel for incoming call indication 4) Record important information during conversation 5) Wireless headset convenient for private conversation 6) Switch to car kit and speaker easily 7) High capacity Li battery, standby time: one week 8) Auto answer or no auto answer optional 9) Last number redial 10) Dimensions: 28cm x 9.5cm x 1.9cm 11) Weight: 379.2g/pc 12) Battery: chargeable Li battery 13) Color: silver