A backup route. For important events.
Wi-Fi carries DoorBell's video. Adding a compatible Ajax hub gives important events another way to reach you if that Wi-Fi connection is lost.
Hub: the link to your alarm. An Ajax hub is the control unit for compatible alarm devices. It also links DoorBell to the system's backup radio communications.
Jeweller: events and alarms. This radio link carries events and alarm notifications between DoorBell and the hub when Wi-Fi is unavailable.
Wings: a picture of what happened. This separate radio link can deliver photos through the hub, with an active Ajax Cloud Storage subscription.
These backup links do not carry live video. DoorBell still needs Wi-Fi for its video stream.