SUXM Dog door ABS material plastic door opening installation[Classic double with 4 lock design]: You can easily switch between the four modes by operating the red and green bulbs: Open, In Only, Out Only, Close Lock. It saves time and is even more convenient and fast. There is a magnet next to the , and the door will automatically return when the cat passes by. The rotating shaft on the door freezes in cold weather, and I think that it can be used without problems if a little oil (a type that does not harden even at low temperatures) is added to it.[Improved Weather Resistant Brush Strip]: Provides a snap tab fixed groove for the weather resistant brush strip and secures the brush strip firmly, which reduces noise, stops wind and rain , Helps to prevent mosquitoes and insects to the maximum. Even if it snows in winter, you can keep warm and warm at home. The brush design eliminates noise when cats move in and out, effectively ensuring a break even during nighttime sleep.Easy installation convenience]: You can easily and quickly install this product on doors, walls, windows, cabinets, glass, etc. By installing it, your life will be very convenient. You can save time opening the door and control the cat's entry and exit freely.Delivery Quantity: 1 PieceProduct color: blackProduct size: outer size 20*19*1.8cm, inner size 16*15.7cm, suitable for cats under 8 catties with waist circumference less than 20cm