Visible Reverse Parking Sensor is a breakthrough product that uses CMOS video camera input to capture the rear images and ultrasonic sensors to measure the distance between your vehicle and any obstacle(s) at the rear. Making use of advanced mirror technology with ultra-clear video on a 4.3" TFT screen display, P8 Visible Reverse Parking Sensor helps the driver to get a clear view of the rear of the vehicle and a human voice system providing real time alerts indicating the distance and warnings.