DSP Technologies Bluetooth Auto Steering Wheel Hands Free Speakerphone Kit VTB-30 Universal fitting systems for all steering wheels, stick on anywhere in your car The car steering wheel Bluetooth is simple to operate, one botton to answer/hang up/reject a call and call switching function This handsfree Bluetooth car kit can scroll the last 10 numbers of calls, store 200 numbers and call back DSP technology, full duplex, noise and echo cancellation The car steering wheel Bluetooth is with built-in 600 mAh li-ion battery, which provides typical standby time of more than 240 hours, talking time of 6 hours