Hight quality steel material, anti-theft doorbell door mount aiming to prevent video doorbell from stealing, provide a perfectly safe environment for your family. Suitable fit for Video Doorbell 1, for Video Doorbell 2, for Video Doorbell 3, for Video Doorbell 3 Plus, for Video Doorbell 4, for Video Doorbell 2020, for Video Doorbell 2021, for Video Doorbell pro,for Video Doorbell , Size: 16.8x12.8x7.8cm. Fit for bath inward swinging door and outward swinging door, the thickness of door must be in 0.6-2.1inch, can adjust. Easy to installtion, anti rust, anti theft, no drilling, stable, adjustable. Suitable for home, hotel, apartments, rentals, houses, dorms, businesses, and much more. Specification: Material: Hard Plastic, Steel Color: Black Size: 16.8x12.8x7.8cm/6.61x5.04x3.07inch Package Includes: 1 Piece Anti-Theft Video Doorbell Door Mount Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!