Review on 📸 DOUXURY 4 Split Screen Backup Camera System with HD 1080P Monitor and DVR Recording by Tom Ball

Purchased for our 36ft DP coach. He had good qualities and was well built. SD card not included said you need to request it so it doesn't work as a DVR right away. I turned on the power before installing to check if everything is ok. On 3 out of 4 cameras, a vertical active line moved across the screen. It was about half an inch wide, colorful and very distracting. Basically, I took a picture with no activity and added movement to it. I tried adjusting the contrast and other available settings but nothing changed. Swapped cameras from a good location without changing the affected area. A good zone worked correctly with all cameras. Came back to buy a similar quad camera. I wouldn't buy for myself.