Larger 7 inch Split Screen Monitor: with 1920x1080 pixels features with 4 Split Screen, allows you see 4 cameras at the same time and provides more details. It is more suitable for the large vehicles as: 5th Wheel Trailer/Tractor/RV/Truck/Bus/Semi-Trailer/Box Truck, etc Built-in DVR System: Supports 4 cameras for simultaneous recording and loop recording, which will become your driving evidence if necessary. Also has mirroring function/formatting/split screen setting.