Even if the door is closed, cats are allowed to use their personal space without restriction. 4 ways to adjust: no entry and no exit (fully closed) / exit and entry (fully open) / only entry and no exit / only exit and no entry, easy to control entry and the output of the animal. The cat door is widely installed in closet doors, laundry room doors, windows, walls or cabinets and can be dedicated to the entrance of food, trash cans or gardens. Clear flap lid allows your cat to see their food or litter box from the other side of the door, making it easier to train and adapt to the environment.