For Blink Google Ring Doorbell Device Universal Door Overhead Bracket Anti-theft Adjustable 1. Made of environmentally friendly high-quality plastic, U-shaped box with stainless steel, very durable and waterproof 2. Upgraded anti-theft design, prevent doorbell and camera from being stolen 3. Compatible with ringing doorbellflashing doorbell camera 4. Widely used in residential, apartment, rental, dormitory buildings, commercial buildings 5. No need to drill holes on the wall or door, put the doorbell into the housing, use the fixing clips to fix it, adjust the fixing clips and then you can 6. Can be used for doors that open to the left or right (doors that must open inward) 7. The thickness of the door should be between 1.05 inches and 2.46 inches, and the width of the door gap is recommended to be more than 0.05 inches 8. Applicable models: for Ring Video Doorbell 1, Ring Video Doorbell 4 (2020 release), Ring Video Doorbell 2, Ring Video Doorbell 3, Ring Video Doorbell 3PULS, Ring Video Doorbell 4, Blink Video Doorbell 2021, etc. 9. Size: about 5 x 7 x 8cm 10. Description: only the stand, does not include other items such as the doorbell in the picture