Car reverse radar sensor systems help to prevent dangerous and costly collisions that occur so easily when behind the wheel such as blind spots. It helps to provide increased safety for passengers pedestrians and family members who happen to be around the moving vehicle. Detect kids and low walls as well. This Parking Sensor notifies the driver of the distance and the position of obstacles by means of an acoustic beep and visual display to make reverse maneuvers safer. The system will work automatically when the reverse gear is engaged. The sensors work on cutting-edge ultrasonic detection technology and have been specially designed to blend in perfectly with your vehicle bumper.