✿ Compatible: The product will be 360°encases your video doorbell, compatible with Video Doorbell 1/2/3/3 Plus/4/2nd Gen(2020 Release). Doors Thickness: 1.0-2.5in/(25mm - 65mm); Doors Gap : Over 0.06in/(1.6mm).(Not Included Doorbell) ✿ Anti-Drop and Anti-Theft Design: The product belongs to the built-in screws, the appearance will not be able to view the specific location of the screws, please read the manual for details, Not longer have to worry about the bad guys steal your doorbell. ✿ Exquisite Workmanship: Built-in bottom panel, equipped with special screws, pressing the doorbell for a long time will not loosen, will not affect the visual range of the device.(No need to stuff a lot of sponge) Doors Thickness: 1.0-2.5in/(25mm - 65mm); Doors Gap : Over 0.06in/(1.6mm). ✿ Easy to Install: No need to pad into the sponge, the package contains instructions and various parts to follow, according to the thickness of your door to adjust the fixed clip, no need to worry about loose. ✿ No Need to Drill Holes and Anti-Scratch: Install by twisting the rotating screws on the back of the door, near the door there are iron sheets to protect your door from scratching by accessories.