This eyeball camera is equally suited as a replacement for standard definition analogue cameras or for high definition CVI systems due to its ability to be configured as a conventional CCTV camera or an HD CVI camera. The camera is therefore fully compatible with older systems which is very useful as it makes the gradual upgrade of a system to HD much more cost effective than upgrading a system in one hit. The camera will run happily on the standard DVR and monitors until such time you decide to upgrade to HD. At this time you simply replace the DVR with an HD model and switch the camera to its true HD mode to take advantage of full HD CVI quality.