Fookoo HD Backup Camera System, 7'' DVR Split Screen Monitor and Waterproof Rear View Cameras with Parking Lines Reversing for RV/Truck/Trailer/Bus/Semi-Trailer/Tractor/5th Wheel Trailer(DY704)

Loop Recording Function Featuring with this function, monitor will automatically overwrite the earliest video segment when the memory storage space is full. Monitoring and recording your driving to make your driving safer around the clocks. The package doesn't contain the SD Card. Multi-function Split Screen You can choose to view 3 cameras images at the same time, or choose view 2/4 cameras at the same time, by pressing "CH-" button. Alternatively, you also can see one camera for full screen separately. When you want to see other cameras, just press the "CH-" button. Parking Lines Assistance Reversing screen with parking line will make your parking safer and faster.