The CCTV security system has two primary types, DVR and NVR recorders which in combination make a whole system. This recording system connects the CCTV camera that captures the movement and that you might want to capture. This security system is the foremost used system now a days and comes in a various variety. The two prominent ones are wireless and wired. The security system is capable of placing anywhere at home and in offices. However, some of the specification might vary. One of the important specification that varies is the distribution of channels. It could be any from 4 to 16 channels.