Description: 1.12V - 35V dual car backup system: upgrade dual backup cameras made of high quality materials to see both the trailer hitch and the road behind the vehicle. Use for 33/66 ft length motorhome / trailer / camper / truck / pickup / bus etc. 2. 9 inch split monitor: 4 channel input; One button, select one channel, Sharp color and high contrast. Image can be rotated horizontally and vertically to flip or display normally. Display full time and switch channel by button. 3. waterproof rear camera with IP 66 protection: 120-degree wide angle, strong interference suppression, 4-pin cable - more tightly connected. Waterproof lens and outdoor for long time. 4.Car infrared night vision: 18 IR lights provide perfect vision when the light is dim or even in the darkest night.