Check the listing for details. ROSTRA 250-1594 ROSS STANDARD REAR OBSTACLE SENSING SYSTEM. Condition: New. Listed at 250.00 USD. **new/old stock** dates range but most are 2003 Precision Controls Rear Obstacle Sensing SystemDescriptionThe Rostra 250-1594 is a Standard Rear Obstacle Sensing System (ROSS) detects objects that you can't. Using the latest microwave motion sensing technology, the ROSS alerts you to obstacles as far away as 12 feet behind or next to the rear end of the vehicle.SpecificationsRostra Model : 250-1594Obstacale Sensing SystemAlerts Driver with a Three-Color Visual LED and an Audible Beeping ToneWorks in Poor Weather ConditionsState of the art Microwave Motion Sensing TechnologyDoes not Change the Appearance of the BumperAuthentic and High Quality ProductGeneral Features:Alerts Driver with a Three-Color Visual LED and an Audible Beeping ToneWorks in Poor Weather ConditionsState of the art Microwave Motion Sensing TechnologyDoes not Change the Appearance of the BumperSpecificationsManufacturer Part Number250-1594Model250-1594BrandRostra