REAL-TIME ALERTS: Hear notifications in your home when a visitor presses your Yale Smart Video Doorbell. Place multiple chimes around your home to always hear the notifications wherever you are. EASY PLUG-IN INSTALLATION AND SET-UP: Plug into standard wall power sockets and pair the device easily with your Yale Smart Video Doorbell. UNIQUE YALE TONES: A variety of unique Yale tones to choose from, adjustable volume and do-not disturb mode. COMPATIBLE WITH YALE SMART VIDEO DOORBELL: The Yale Doorbell Chime works with the Yale Smart Video Doorbell only.