Marksman MBS250 w/Digital Display
Universal Reverse Sensor System

Designed to be an aide in reversing or parking a vehicle by sensing objects behind the vehicle. The Ultrasonic sensors will sense the distance of an obstruction or another vehicle and alert the driver of its presence and approximate distance by a series of audible beeps.

• Includes 2 X Independent Ultrasonic Sensors that start detecting objects with 6 ft of the rear of the vehicle. 
• Angled Sensor Sleeve/Washers (Removable) for any needed sensor adjustment to bumper angle.
• Mounting brackets are included for surface mounting the sensors if drilling holes for the sensors is not desired. 
• Audible Beep Indication that begins when an object is within 3 ft of the rear of the vehicle and pulses faster as the object becomes closer.
• Visual Dash Mounted Display Panel that indicates how many inches (or cm) the rear of the vehicle is away from an object. Also indicates "STOP" on the display within 6" of the object being detected.
• Small System Control Module
• All Cable & Connectors
• Complete Installation Instructions w/Mounting Template
• Universal Design for installing on Small, Mid-Size and Large Vehicles
• Sensor Mounting Templates 
• 1 Year Warranty
• Download Installation Manual HERE
• Click On above Image for more Details

When in reverse, the 2 rear sensors installed in the back bumper send ultrasonic sound waves that bounce off objects. A display panel mounted inside the vehicle provides both visual and audible warnings to the driver regarding the distance of the object.