It support Android and IOS operation system. Guests can make video voice call,and record for a short video,the owner will know who in front of the door and don't need open the door,wireless WiFi support connect multiple user online watching same time. Mobile APP is supported for remote viewing, you can see everything in your home no matter where you are. With IR night vision function,the night vision can be clearly seen. PIR anti-theft function, providing active wake-up function. Automatic photo/audio video recording. (Not only video recording, but also audio recording) No wiring required, battery powered, visual intercom, simple installation; It can also be powered by electricity. You can talk to visitors smoothly at any time and any place.