The advent of security cameras has provided a newest type of security. People are always thoughtful about the question of security. In this reason, they have selected a person as security guard. This type of security has been posted from the ancient ages of colonial empires. Then these security guards are hired for the guard of factories, farms, offices etc. But now this type of security guard is available in a reduced rate. In place of security guard, no we have got the invention of newer guard for security. The name of the guard is security cameras that can secure us for round the clock. In a word, these types of cameras are called CCTV system. Its working process is simple and easy. One operator can operate all the cameras connected with the processor machine. There he can watch all details happened in front of the cameras. The cameras obviously will be able to capture video format picture. There is a device that can record the picture minutely for second to second.
The display of a TV can show us all. That is the simplest way the security cameras work. If the operator watches something wrong, he informs the authority and resolves the problem. There are two types of cameras, such as wireless cameras and the camera with wires. Obviously, the first one is more affordable and compatible to all places. The wireless cameras transmit the signal of video to the main processor machine and we can then get all details of the events happened in front of the camera. This type of cameras are so much necessary now-a-days that a small camera can be set in a hidden corner of a room and you will be able to get all information of the room from the distance. That is the main facility of these types of cameras. But, there is some hindrance of these cameras. If someone knows the weakness of the cameras, he can easily trespass to any place without informing to his identity to the camera. Simply, he can hide his face or can hide the camera front or can discard the cord from the cameras. So, every invention has its merits and demerits. We should use them with care. Some web pages are providing detailed information with proper pictures; you may collect information from there also.