This high quality sensor system is a complete package, works independently of other systems and comes with everything needed for installation. Its 4 sensors mount on the rear bumper of a vehicle and it comes with a small console that s placed in the front of the vehicle. The console displays the distance you have behind your car and has a speaker which beeps the closer you get to an obstacle behind you. The sensors, control module and cabling system are waterproof allowing for an easy install.