Both, as described by @pguntern.

Both :)

The "loitering" time outside the front door can be set from 1 - 15 seconds (app on the mobile). The monitor supplied with the device is then switched on. The monitor is mounted directly behind the camera - connected with a short cable - on the inside of the door. At the same time, a message is displayed on the mobile phone. The app can then be used to call up the short surveillance video or the current camera image. Alarms and video recording can be customised via the app. If someone rings the doorbell (camera bell button), the monitor is switched on and a message is sent to the mobile phone. You can communicate with the visitor via the app - regardless of your location. In Mallorca, however, you have to think about whether you want to tell the visitor that you are far away :-))