The Car Parking Sensor System can help you avoid those costly backup collisions that happen so easily, What's more important, it can help save the life of a little kid. Once installed, the system will automatically turns on when you put your car into reversing, If an object is detected while backing up, the system emits audible beeps and shows the distance on the on-dash display telling you how far you are from an object. The faster the beep, the closer you are, if you are too close to an object, the beep sounds like an alarm.