【4 Rotating Locks】: Our indoor/outdoor cat door can be set to 4 modes using the rotating lock with tabs: exit only, entry only, both entry and exit, and fully locked, allowing easy control of your pet's comings and goings. 【Size】: Exterior size 27*23*5.5cm (L x W x H), Interior size: 19.5*18cm (L x W), suitable for installation on thin doors and walls, suitable for cats lighter than 11kg. 【Quiet】: With the help of magnets and brushes, the panel does not come into direct contact with the plastic, which can reduce the noise caused by large cats going in and out. The transparent door panel ensures that pets can observe the indoor and outdoor environment at all times. 【Reduce Your Heating and Air Conditioning Costs】The doors cannot be left open all the time, allowing the cat to come and go freely without the heat in the rooms of the house cooling down. 【Easy to Clean】The smooth plastic casing makes it easy to remove stains brought in by your cat from the outside. Note: It is best used