... * 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) ... electronic products, including: Pocket Projectors, Tablet PCs (MID), E-Books, Car DVRs (Car Blackbox), Bluetooth Car Kits, ...