The doorbell has alarm and mobile monitoring function, protect your home safety effectively, reduce your worried. You can monitor environment of your house via mobile phone whether you at home or not. After the visitor rings, mobile devices could interact with doorbell via real time video and audio, unlock, take photos, take videos, and alarm. This app is specially built for P2P IP camera series. Thanks to unique P2P connection technology that users are able to watch live video on iPhone from any purchased IP Doorbell by simply enter doorbell's ID and password. No complex IP or router settings required. the video compressed in H.264 format which guarantee for crystal clear video.