Easy Installation Steps: It can be done on wooden or PVC doors. Adapter required for masonry, glass and patio doors Adapts to various weather conditions: Thanks to the weather protection strip and improved automatic double locking, wind and heat stay out Ensure more freedom for your dog or cat : It allows you to offer your dog or cat maximum freedom; It is an ideal solution for letting cats and dogs into your home without having to open the door frequently. Your pet will become more independent Simple and practical closure: in addition to being easy to install, this door will allow you to give your dog or cat maximum freedom. Durability: This pet door is strong and durable thanks to its tough, clear plastic louver and high-quality, durable plastic frame; the door is suitable for most standard walls and doors There are four modes (1) Close the door lock in both directions. (2) means that the door opens in both directions. (3) Let cats out, but don’t let cats in. (4) Entry is permitted,