7 inch Rearview Parking Sensor with Bluetooth Function

When reverse gear is engaged the system provides an instant, automatic, self-diagnostic function that maps out the surrounding area of your bumper constantly monitoring this as you reverse with 100% accuracy. With this rearview parking sensor, many accidents would be avoided. http://www.car-electronics-accessories.com/car-electronics-parking-sensors-7-inch-rearview-parking-sensor-with-bluetooth-function.html