Upgraded Anti-Theft DesignWe designed this anti-theft bracket for flashing video doorbell. It cannot be removed from the side of your door unless the door is open. The anti-theft doorbell bracket provides a safe environment for apartment renters! Doorbell not included. Easy Installation: Attaches in seconds and installs and uninstalls easily so you can take it with you or move locations easily. Put your flashing doorbell at inside and fix it on your front door. You don't have to worry about losing the case opening tool, the included anti-theft steel sheet can be used as a case opening tool to open your Blink doorbell. Compatible with most doors: The thickness of the door between 2cm and 6cm, the size of the door slot must be greater than 0.2cm or more to be used. The door must be facing inward, the security door iron can not be used. Ideal for rental houses, apartments, offices, rooms, businesses. High-quality material: Anti-theft bracket without drilling made of high-quality 304 stainless steel and aluminum alloy. Does not block the Blink doorbell sensors. The Blink doorbell fits perfectly indoors