Closed-circuit television (CCTV), also known as video surveillance, is the use of video cameras to transmit a signal to a specific place, on a limited set of monitors. ... CCTV systems may operate continuously or only as required to monitor a particular event.
A CCTV (closed-circuit television) system allows the use of videos cameras to monitor the interior and exterior of a property, transmitting the signal to a monitor or set of monitors. Most home security cameras are motion-activated and will record when they detect motion, as well as send you an alert. Some can record 24/7, which is known as continuous video recording (CVR).