1,500

Closed-circuit television (CCTV) is the use of video cameras to transmit a signal to a specific place, on a limited set of monitors. In industrial plants or hospitals, CCTV equipments may be used to observe parts of a process from a central control room. CCTV systems may operate continuously or only as required to monitor a particular event. A more advanced form of CCTV, utilizing Digital Video Recorders (DVR), provides recording for possibly many years, with a variety of quality and performance options and extra features (such as motion-detection and email alerts