https://sciencewiki.science/wi....ki/UPVC_Door_Panel_R
Many cat owners have experienced the feeling of waking in the middle of the night by a call to let their pets out and then to change their minds and decide to return later. A cat flap can solve this issue. It operates by scanning your cat's microchip, allowing in only authorised cats and block access to other. There are many advantages to using a cat flap. These include: Peace of mind Cat flaps help to keep your cat safe and secure by allowing them in and out whenever they want. They can be in the dark if they want,