https://nosewasp3.bravejournal.....net/cat-flap-instal
https://www.openlearning.com/u..../clevelandmcgee-smh1
A cat flap is a door that allows your pet to go in and out of the house at their own pace. It can be fitted into doors, windows and even walls. It opens when your cat pushes a part of their body through it. Microchip cat flaps recognise your cat's unique microchip to unlock the door. Infrared and magnetic cat flaps require your cat to wear a collar that has either a magnet or an infrared device that will activate them.