Power supply: DC12V-35V- video cable connection. The cable length about 20m(65.6ft) and 10m(32.8ft) , so it is perfect for most cars. A wide camera lens viewing angle makes sure that you can see enough to park and reverse safely.Eliminating dangerous blind spots. Protect your car around of Kids and little pets. 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, 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. Night Vision Car Vehicle Front /Rear View / Side View Camera. 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 480 resolution lines. 9 INCH MONITOR: Comes with a 9'' Color 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 for Car Vehicle Front /Rear View / Side View Camera. Each lens can be adjusted in different angles for a full 120° maximum visibility and also comes with a remote control.