Touchscreen Video Intercom - Internal - DoorBird A1101IP Intercom Indoor Video Station A1101 IP Intercom video communication in single family residences and apartment buildings. This sleek 4" screen not only allows you to see your visitor, talk to them, and let them in; but it also provides 3 more Door relays to expand the access control element of your Doorbird system. This means as well as the front gate, you can add the front door and the garage door to be controlled by the many features in the app.