CICMOD Wireless LED Display Car Reverse Backup Radar with 4 Parking Sensors (Grey) Colored LED digital display shows the distance between the car and obstacle Enhanced CPU and advanced 4 auto detector sensors. 4 sensors are anti-freeze, waterproof, and quakeproof Prevent future dangerous and costly collisions The vocal notification of "Bi-Bi" and digital distance display show the characteristics, especially at night The Smart Start function: new design, more intelligent, when braking, the radar starts, there are obstacles into the detection area, the monitor will start work. More humane, more scientific