[Anti-theft Design] - The anti-theft doorbell bracket is only compatible with for Blink doorbells, which can wrap your video doorbell securely and cannot be removed from the door side unless the door is opened. Perfect for apartments, offices, rental houses and dormitories. (for is not included) [No tools or installation required] - Securely installs in seconds, easy to install and uninstall. Just put the for Blink video doorbell inside and slide it on the front door, and adjust the fixing clip according to the thickness of the door. [Applicable Doors] - Checking the door before ordering is the most important. The door must swing inward. The thickness of the door must be between 0.6 inches and 2.3 inches. The door size needs to be 0.06 inches to use. Iron anti-theft doors cannot be used. [High-quality materials] - for bracket is made of high-quality plastic shell and metal. It fastens securely, so your for not fall off the door. All holes of the for cover are carefully designed and not block the doorbell motion sensor and two-way audio. Colour: Black Material: ABS+Metal Package Contents: 1 x Video Doorbell Mount Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.