1. Reverse Parking Sensor System 2. High quality, Energy-Saving 3. Custom Fit, ... Sensor System Plastic 12 / 24V (DC) 5W10Black / White • Sensor with self-inspection function. • The unit will work automatically when car starts. • 4-sensor ... design, pecisely detecting the obstacle. • Digital, directional and sound reminder. • System switch operation: monitor ...