Rand McNally GPS and Tablet backup camera - trailer tow cable version Use your GPS as a backup video camera monitor! Hi-Res backup camera designed for Rand McNally RV camera-enabled model GPS Trailer tow disconnect version - includes 35' cable on the truck side, 45 feet on the trailer side, and 6 feet (max) stretch between the towing vehicle and the trailer High quality, 140 degree wide angle, Sony CCD lens technology Adjustable (up down) angle, waterproof, all cables are included Use two machine screws or bolts to bulkhead mount, or license plate bracket mount the unit. A 9/16" hole or opening will be needed near the camera to pass the connector into the vehicle or trailer. No power connection is needed at the camera as it gets its power from a 12 volt lighter socket inside the vehicle near the GPS.