Backup Parking Sensor System with Rear Roof Mounted LED Display Rear roof display with mirror image reading Mirror image display, rear roof mounting, three tones color LED display, audible alarm 4 sensors system, left and right LED indicator with 2 digit display, audible alarm, easy DIY. Brand New from the maker - GEARFLAG This is a new generation parking sensor combining with whole new design of display. This is a rear roof mounting display just like some of the expensive cars. It features mirror display, that driver will be able to view the display through rear view mirror to monitor both backup condition and also the distance. The display equipped with clip to be able to clip on the rear roof without drilling hole. Mirror display LED digital screen Three color LED to determine three detection zonee 4 sensors system (can be spray painted into any color to match your car's color). We have black, white and silver color to choose from. 21mm sensors (newly developed by Gearflag) Detection range: 1.5m - 0.3m   What is in the boxx LED Display 4 sensors Main control box Hole saw for sensor installation Manual