1. Reverse Parking Sensor System 2. High quality, Energy-Saving 3. Custom Fit, Factory ... . Samples Free of Charge ♥ Our Advantages: 1. 5 years auto led light industry experience 2. Your every enquiry will be timely ... function. • The unit will work automatically when car starts. • 4-sensor design, pecisely detecting the obstacle. • Digital, directional and sound reminder ...