Unlocking with an NFC card, the UniFi Identity Mobile App, a PIN code, or a QR code. Address book and doorbell for access requests. Pairing with multiple UniFi Intercom Viewers for remote access control. Connects to the UniFi Access Hub series via PoE. Weatherproof (outdoor use -30 to 60 °C). Indoor/outdoor intercom for managing access requests to residential and commercial buildings.