Universal Bluetooth HandsFree Car Kit for All kind of Bluetooth Phone. (Compatible with all kinds of GSM / CDMA / TDMA / WCDMA bluetooth phones.) 12Digit Caller display with large LED lights Voice Announcing for Incoming Phone Number Changeable Ring Tones (16kinds of rings for available) Digital Noise & Echo Suppression System Full Two Ways (Duplex) Conversation High Powered Amplifier and Speaker Voice dialling, Redial and Audio Transfer Function DSP technology, Noise and echo cancellation Built-in FM frequency transmitter with 7 FM Frequencies for avaible Audio Input supported Earphone jack for available