Product Quality Assurance : Voltage range from 9-36V DC to fit various large vehicles, such as RV, semi-trailer, box truck, fifth wheel trailer, bus, tractor, ect. If you find it defective or missing something, please tell us first, we are online 24 hours a day and provide 24 months replacement support and lifetime after-sales service. Easy to Install : This is a wired system, but the package that includes all accessories for the system makes installation easier. All you need is: connect Red wires to ACC, Yellow to the positive of Battery, Black to the Metal (Ground), and other wires connect as instructed, then run the cables on your vehicle. If you need one more cables or Car Cigarette Lighter, please ask us. Loop Recording & Parking Lines : With record function, the monitor will record videos while driving and even during accidents, so it will provide you with video proof when you need it to make your driving safer and more reliable. With Parking Lines, you can park or reverse more safely and quickly, no longer needing someone to get out the vehicle to help you see the road or guide you. High Quality Camera with Glass Lens:IP69 Waterproof camera with CCD sensor provides you clear and color images. With high/low temperature resistance (-4?-198?) and IP69 Waterproof, it works perfectly in any extreme weather. The lens of the camera can be adjusted up and down, allowing you to view the images from the Angle you most want. The hard metal housing makes the camera serve longer for you. Larger 10 inch Split Screen Monitor:Our 10-inch monitor has 1920x1080 pixels and features a Triple Split Screen that allows you see thress cameras at the same time and provides more details than the 7-inch / 9-inch screens commonly available on the market. It is more suitable for the large vehicles, such as: 5th Wheel Trailer/Tractor/RV/Truck/Bus/Trailer/Box Truck, etc.