... * TTS function, DSP Technology * Phone book Steering Wheel Bluetooth FM Car KitDiscription:Steering Wheel Bluetooth FM Car Kit, wireless headset, phonebook ... technology for noise and echo cancellation .Features:1. Steering Wheel Bluetooth car kit with DSP(Digital Sound Process) ... DVRs (Car Blackbox), Bluetooth Car Kits, Car FM Transmitters, Mini MP3 Speakers, Digital Photo Frames, MP3/MP4 Players, etc ...