Video door entry system
Video call for a front door in an apartment. Video door phone. : Video Door Entry System
Quote from Article entitled Video call for a front door in an apartment. Video door phone.:
When you press a call-button a signal arises and the photo or video recording of a visitor automatically begins. Seeing the man who came, you can talk to him, let him in or ignore the guest.
The full version of the article can be found here.