Function: 1. Includes full instructions for easy installation on windows, doors, cabinets, etc. Very suitable for cats and puppies, the door is suitable for pets weighing less than 15 pounds or less. 2. Save time opening the door, free control of the cat in and out. A durable, weather-resistant pet flap prevents cold air from entering. 3. Exquisite design, the transparent flap allows your pet to see from the door, thus reducing the fear of use. The outer mesh prevents rain, wind, snow, mosquitoes and other insects from entering. 4. After the cat passes through the cat door, the magnet at the bottom causes the cat to return to its original position. 4 switching modes, only switching, only input, input and output, fully locked, easily control your pet; easy to slide red / green switch. 5. Equipped with a buckle groove, a soft waterproof brush can be attached. The brush covers the gaps in the flame, effectively reducing outside noise. Specification: Item Type: Pet Flip Door Material: plastic; Package List: 1 x pet door; 8 x screw 8 x nut 1 x double-sided tape 1 x English manual 1. Make sure your cat's weight should be less. 2. If the rotating shaft gets stuck in cold weather, just drop a few drops of oil (not freezing) and you will see it come back smoothly. 3. To meet the needs of different doors, we have prepared two types of screws, longer screws are used for thick doors, and shorter screws for thin doors.