Closed circuit television cameras are used in a variety of circumstances to provide video surveillance. In businesses use CCTV cameras to monitor the behavior of employees. In schools you can use CCTV to monitor the activity on school campuses .It can also help retail establishments by providing protection against loss from theft

In today time security is a major concern for Homes, Offices, and Residential Societies also. By the help of this device you can hear voice & see the person who is in front of your door. There are two types of technologies in this, one is for only audio communication and second is audio with video communication.