CCTV is a type of surveillance system that uses cameras to transmit video signals to a specific, limited set of monitors.

Benefits of CCTV:
1. Crime Prevention: CCTV cameras can deter potential criminals from committing crimes.
2. Investigation and Evidence: CCTV footage can be used as evidence in investigations and court cases.
3. Monitoring and Surveillance: CCTV systems enable real-time monitoring and surveillance of premises.
4. Improved Security: CCTV systems can improve security by providing a visible presence.

Types of CCTV Cameras:
1. Analog Cameras: Traditional CCTV cameras that transmit analog video signals.
2. IP Cameras: Internet Protocol cameras that transmit digital video signals over IP networks.
3. HD Cameras: High-definition cameras that provide high-quality video images.
4. PTZ Cameras: Pan-Tilt-Zoom cameras that allow for remote control of camera movements.