Well, they are just like the ordinary video cameras although they have several unique features. For instance, they come with monitors that help them to operate on their own. They can also use wireless transmission to send images to monitors. Once the monitor has received the images, it sends them to the video tape or DVR. CCTV systems are highly effective, be it in the area of public surveillance or private security. In various cities, CCTV cameras and security systems have helped in reducing the crime rate in the monitored areas. With the advancement in technology, security footage monitored through closed-circuit system can be accessed in many formats. The most basic form is the delivery of footage to a traditional desk with monitors, watched by security personnel. CCTV security system technology and CCTV equipment can be used in both internal and external environments to watch over and protect people, property, vehicles and valuables.