The installation fuse box must be > = 20 A. Auto power on with your vehicle ignition and easy to install. Power supply directly from your car. Default boot recording, no second missing. Advanced safety design with no risk of battery explosion and with much longer life; Intelligent segmented storage, smooth loop recording, never full disk. Wired camera system without any signal problem. One power cord supports the entire system. The camera only needs to connect the monitor extension cable. Split ISP 4 HD Touch Screen & Built-in DVR Recording Function: 10.4" Wide Screen The rear view camera system supports quadruple view display, a total of 4 video inputs of front and rear cameras and 2 side view cameras can be displayed on the screen. 4 split screens, 4 channels, 4 different angles help us get a 360 view to make driving safer. Advanced DVR function, support local playback and loop recording, you can find the video easily on the monitor. It supports a card from 128GB to max. 【4-Channel Waterproof Cameras,Super Night Vision & Wide View Angle】- High definition glass camera transmitting light, transparent image, high definition, detailed performance beyond your imagination, clearer forensics in low light conditions. Excellent water resistance, safe to use in sunny or rainy weather. Clear night vision and 170° wide viewing angle allow us to capture the clear image quality in any conditions, help us to observe everything around us, avoid blind spot and drive safer. FLEXIBLE VEHICLE COMPATIBILITY - Voltage range of DC 9-36V to fit a wide variety of vehicles like RV truck, A-class trailer, semi-trailer, horse, bus, school bus, RV tractor, 5th wheel, camper van etc. 【Additional Useful Function】- (1) Can work from -20°C to 60°C. (2) The phone can be connected to the monitor for calls. (3) Multi-angle adjustable stand. (4) Can play music or videos for entertainment. (5) Shutter Display: Automatically switches to the corresponding camera view. (6) Reversing image function, and can adjust the recoil line. (7) With parking monitoring function, it is a good soldier for your safety. FM transmission, etc. ASLONG is confident in the quality of the product. Your purchase is absolutely pleasant. We offer one year warranty service. You can contact us at any time. Package Included: 1 x 10.4 inch Screen; 4 x Camera; 4 x Camera Extension Cable; 1 x Power Cord; 1 x Stand; 1 x 128GB TF Card