Quality Assurance: Voltage range from 9-36V DC Power to accommodate a wide variety of large vehicles. If you find defective or something wrong or need more cables, please contact us, we are Online 24 hours and offer a 18-month replacement support and lifetime after-sales service. Easy to Install: Only need monitor connected to power, then the power could transfer from 4-pins aviation connectors extension cable to camera, needn’t to connect more cable, solve wiring inconvenience. Specially designed for trucks, trailers, 18 wheelers, vans, buses and other huge vehicles. Securely install the device on your car by storing it inside the car’s trunk and place up to 4 cameras on rear, windshield, and dashboard. NIGHT VISION CAMERAS: 2 front view camera without guidelines + 2 backup camera without guide lines. IP 68 waterproof and 18 IR lights night vision allow night vision illumination and auto image adjustment capabilities for day or night use. All have PAL/NTSC auto switching systems and 420 resolution lines. 7 INCH MONITOR: Comes with a 7'' Color TFT LCD monitor that has a built-in quad control box screen function. It supports 4 video inputs that allow several viewing modes - single full view, split dual view and split quad view. 4 CHANNEL SYSTEM: This video surveillance system comes with 4 available video cameras for a 4-channel vehicle surveillance system. Each lens can be adjusted in different angles for a full 90° maximum visibility and also comes with a remote control.