Convenience and safety are two main characteristics of the video door phone (or video intercom). In addition to voice communication, they assume the presence of a video signal transmission. Its presence allows you to hear/see who is standing at the entrance to your house or apartment. You can control who will get access to your front door. Such models are also equipped with a special infrared illumination. This makes it easier to control and monitor the entrance at night. This system helps to prevent unauthorized entry, making your home safer. A doorbell with a video camera in it does not ensure your safety. It is merely a tool that can be used to enhance the security around the door. It depends on how you use it. Most of those cameras have an area that can be setup as motion detection. If the camera detects motion in that area, then the camera starts sending out a video signal so that can be recorded. That is what most people are referring to when they think of a security doorbell camera. - Sunraystechnologies deals with Hikvision,Hifocus,Panasonic,cpplus,bushplus and all brands of Installation and repair service. we are doing cctv camera and Networking too. more details please visit our website.