COMPATIBEL DOORBELLS: QIBOX doorbell mount is suitable for most video doorbell, as Video Doorbell / Video Doorbell 2 / Video Doorbell 3 / Video Doorbell 3 Plus / Video Doorbell 4 / Video Doorbell (2020 Release) The maximum size of video doorbell can be placed inside is 2.55 inch wide * 5.11 inch high * 1.14 inch thick. (Doorbell Not Included). UPGRADE VIDEO DOOORBELL MOUNT: With anti-theft design doorbell bracket, put the video doorbells fit perfectly inside, keep your video doorbell from being stolen when the door is closed. WIDE APPLICATION: Suitable for most kind of Anti-theft door, inward opened door, left or right opened door (outward opened door is not suitable), The thickness of the door must be between 0.6 inches and 2.3 inches. You can measuring your door thickness before ordering. NO-DRILL DOORBELL MOUNT: You can install the doorbell mount in seconds. Put your video doorbell in the shell, then adjust the fixed clip according to your door thickness. Simply place video doorbell inside and fixed onto your front door! PACKAGE INCLUDES: 1x anti-theft video doorbell mount, installation instructions and various installation accessories. Any problem with received products or installation, please feel free to contact us, we will resolve it for you immediately. Anti-Theft Video Doorbell Mount