Color: Black Anti-Theft Design - Specially designed for Blink Doorbell(1st Gen or 2nd Gen). SENLEG encases your doorbell securely, It cannot be removed from the side of your door unless the door is open.(Doorbell sold separately) Door Size Requirements - It s most important thing to check your doors before ordering. Inward-opening doors only | Door thickness 1.37" to 2.3" | Door frame gap >0.1" | Not suitable for iron security doors, storm doors, or screened doors. No Tools or Installation Required - Attaches securely in seconds and easily installs and uninstalls. Simply place the Blink video doorbell inside and slide it over your front door, then adjust the fixed clip according to your door thickness. High Quality Material - Blink anti theft doorbell mount is made of high quality plastic housing and metal. It is tight and secure so your blink doorbell won't fall down the door. All the holes of Blink doorbell cover are well designed and won't block doorbell motion sensors and two-way audio. What You Will Get? - 1 x Blink doorbell camera mount, 1 x doorbell key, installation instructions and various installation accessories.