A CCTV monitors is a device with BNC inputs used to display security cameras on a surveillance system. Most digital video recorders today have some form of video out. A video loop lets users pull a video signal from one channel and move it to another location. If a DVR has a built in BNC loop, users can put video into a DVR for recording and then bring it back out to display on a monitor.
security system because of its high-end equipment, advanced smart home features, and its ability to thwart theft. Don't count out these other picks, though. Each one has its own benefits.