This product is easy to install, easy to operate and is precise and reliable. The park radar unit uses ultrasonic radar to sense the distance between your car and the garage wall. The light will turn green when you first enter the garage, the light will turn yellow when you approach and need to slow down, and the light will turn red when you are in the exact place you should park. Simply program your desired distance from the garage wall to your car's bumper.
Power supply: 6V with 4 AA batteries
Battery life: approximately 1 year
Dimensions: 5.75x4.75x1.5 inches (display unit) 4.65x3.4x1.08 inches (sensor unit)
Parts included: 5 foot modular coiled cord, 4 screws