Never miss the visitors’ call wherever you are.     Monitor what’s going on in front of your house via the APP no matter where you are.    When the visitor presses the call button on the outdoor unit, the indoor unit will ring and you will get notification on your smart phone, open the APP, you will get the video image immediately.  Do the video intercom with your visitors remotely, if necessary you could take photos or record video via APP freely.  Unlock the door strike by indoor unit or remotely by APP for your loved ones.