Adds convenience and security to any Niles MultiZone System and other brands of multizone controllers with paging inputs. Plays Doorbell Chimes through MultiZone Systems - The DBI-2 includes four different doorbell sounds: two versions of the standard doorbell chime sound plus two versions of the Westminster chime. Two custom chimes can also be recorded for a personalized doorbell sound. Customized Sounds - Two doorbell chimes are triggered either by contact closure or by 3V-30V voltage. Audio Paging Input - Connect the DBI-2 to the output of a telephone paging system Chime and Audio Level Adjustments - The sound volume for the chimes and audio paging are independently adjustable allowing you to set the volumes to be equal. Native Support for Illuminated Doorbell Buttons - Adds convenience and security.