https://cameradb.review/wiki/C....at_Flap_Installation
A cat flap is a tiny door that lets your pet enter and leave the house whenever they want. It can be installed in windows, doors and even in walls. It is opened when a cat pushes through a portion of its body. Microchip cat flaps let you open the door by recognizing your cat's unique chip. Infrared and magnet cat flaps require your cat to wear a collar that has a magnet or infrared device that activates the flaps. What is a cat flap? A cat flap is an opening inside an opening or window that allows your pet to get in and ou