This system has 12 cameras (select the 12 camera option on the Amazon page)that are varifocal, meaning you can manually adjust the “zoom” on them. They are 5 megapixel cameras. This system includes a PoE (power over ethernet) switch that all of your cameras will connect to, but it can be up to 330ft from the recorder. All cameras will need to be within 330ft of the switch, unless you have other PoE switches that will be within 330ft of them. Your computer cabling company will need to run a cable to each camera. It is $2150 but is the higher-end of a twelve camera system and are the best rated.
This system is the mid-range of a 12 camera system (select 12 camera system on the Amazon page). The cameras are fixed focus and are 1080p. I wouldn’t select a system with lower quality images than this. You will need to buy additional PoE switches if your cameras are not within 330ft of the recorder, it doesn’t include an extra switch like the one above. Your computer cabling company will need to run a cable to each camera. It’s $1600.