A 4 channel CCTV system is one that is capable of accommodating a maximum of four cameras; thus, it is appropriate for small surveillance needs. When comparing various CCTV systems, it is important to look at the video quality, recording storage space, night vision capability, motion detection, remote accessibility, and compatibility with the selected cameras. The recording machine should be able to produce clear images and easy access during playback. It is important to evaluate the possibility of upgrading the system in the future.