A Reverse BackUp Sensor helps to prevent dangerous and costly collisions that occur so easily when behind the wheel. It also helps provide increased safety for passengers, pedestrians, and family members who happen to be around the moving vehicle. Once installed, the system automatically turns on when the car is put into reverse. If an object is detected while backing up, the system omits audible beeps and indicates the distance between vehicle and car using the optional on-dash display or video screen. The faster the beep, the closer you are. Once the vehicle is too close to an object, the beep turns into a long continuous tone. We also carry a full selection of reverse backup cameras. Check the links below from Echomaster, Audiovox or Steelmate.