FI2704 Bus-truck rear view system The monitor with auto-dimmer function Four-camera input control box Four Individual cameras can be operated by triggers activation automatically. Rear view camera or side view cameras can be set by yourself Automatically switch to the rear view camera(image) when put your car in reverse Simultaneously connects monitor to select cameras Mirror/ Normal image setting switch available in individual camera Specification Power Supply: 12~24V DC Power Consumption:9W~18W Packing list * 7" Color TFT-LCD Monitor * 3/4 CCD Rear view Camera(Optional) * 12-32V white controller * 20 meters cables