The Rear Obstacle Sensing System and Rear Obstacle Sensing System for Trailers from Rosta Precision Controls audibly and visually alerts you to objects up to 12 feet from the rear of your vehicle. The devices use microwave technology to sound the alarm when anything is detected and work day or night, in limited- and zero-visibility conditions. The systems can be installed in about an hour using hand tools. Suggested retail price is $399 installed.
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