Automatic lock and 4-way switching for entry/exit Easy installation on your room door or wall, for your cat's entry and exit. By moving the red and blue buttons left and right, you can easily switch between 4 modes: locked, free, entry only, and exit only. Door panel: Features a flexible brush around the edges, so it opens and closes silently. A magnet at the bottom of the door prevents it from staying open even when your pet goes in and out. Can be used on walls or doors with a thickness of 5mm to 15mm. A template for installation is also included. Notes: * Please check the dimensions carefully before purchasing, as it may not be suitable for pets of certain sizes. * Installation requires drilling a hole in the door. * Please prepare tools such as a saw, measuring ruler, and electric drill for installation.