Alarm.com ADC-VACC-DB-A Digital Doorbell Adapter for Skybell, Includes One Chime Adapter and Blue Connectors

The ADC-VACC-DB-A is a Digital Doorbell Adapter (DDA) that's required for all digital chimes to work with SkyBell Doorbell Cameras. It regulates power to the digital speaker during chiming and must be installed in the middle of the chime's circuit before installing the Doorbell Camera.