AUTO REVERSE BACKUP PARKING RADAR ( WITH 4 WATERPROOF SENSORS ) Brand New in the boxYou will receive a Main Control UnitSensorsInstallation Manual (detailed instructions)Hole Saw to correctly and accuratly drill for the sensorsThis is the same kit that is installed on new dealer vehicles!! with 5 different ranges! Easy 2 wire installation installs in only 35 to 45 minutes. New Technology assists drivers to "see" blind spots, by sending ultrasonic radio waves to detect obstacles behind your vehicle. Designed & Engineered in the USA!!