A rear object detection system to keep drivers away from unseen obstacles. Our under-mount backup sensor kits utilize ultrasonic and wireless technology to transmit alerts. The sensors automatically detect the distance between high bumpers and rear obstructions. Kit components include sensors, a wireless control box and display unit. The ultrasonic backup sensors are placed beneath bumpers, while control boxes mount in cargo areas. These sensors also serve as efficient parking assistants, guiding movements for safety. If an object is within eight feet, drivers receive a digital warning on the LCD display panel. If the rear bumper of a Bus or Van moves into a danger zone, an alarm sounds.  Flush mount backup sensors which are ideal for lower bumpers are also available separately. Both our Bus and Van backup sensor kits support fast, affordable installations of sturdy components.