Compatible Doorbells: This doorbell mount is designed for Google Nest Doorbell Battery (Note: The Google Nest Doorbell is NOT included) Compatible Doors: The google doorbell mount is only suitable for inward-opening doors, with a thickness between 0.6 inches and 2.1 inches, and door gap width exceeding 0.06 inches Drill-Free Installation: Attache the nest doorbell mount securely to your door without any drilling. You can easily detach it in seconds to charge your nest doorbell Theft-Deterrent Security: Designed to prevent theft, this mount locks your google nest doorbell in place. Removal is only possible from inside your home when the door is open Wider Doorway Perspective: Mounting your nest doorbell on the door (instead of the wall) provides an expanded field of view covering more of your entryway. Observe visitors and activity in front of your door more comprehensively Anti-Theft Doorbell Mount for Google Nest Doorbell (Battery)