Simple installation steps: This can be done on wooden or PVC doors. Adapters required for brick walls, glass, and patio doors Adapts to various weather conditions: Thanks to its weather-resistant strip and improved automatic double-locking function, wind or heat stays outside Give your dog or cat more freedom: This allows you to offer maximum freedom to your dog or cat; it is an ideal solution for letting cats and dogs into your home without having to open the door frequently. Your pet will be more independent Simple and convenient locking: In addition to being easy to install, this door also allows you to offer maximum freedom to your dog or cat. Resistance: This cat flap is robust and durable, thanks to its hard transparent plastic blade and its high-quality durable plastic frame; the door is suitable for most standard walls and doors There are four modes (1) Close the cat flap lock in both directions. (2) means the door opens in both directions. (3) Allow cats to go out, but do not