Simple installation steps: it 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 weatherproof strip and improved automatic double locking function, the wind or heat stay outProvide more freedom for your dog or cat: It allows you to provide maximum freedom for 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 practical locking: in addition to being easy to install, this door also allows you to offer maximum freedom to your dog or cat. Resistance: This pet door is sturdy and durable, thanks to its hard transparent plastic blade 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 the door opens in both directions. (3) Allow cats out, but don't let cats in. (4) Entry is allowed but not exit. [Product material]: ABS [Product weight]: 0.65 kg [Product color]: black, white (optional) [Product packaging]: Neutral white box [Product size]: 30*28*9CM Shop Tips:< /p> 1. The size is manually measured, please allow the error (1-3cm). 2. Due to different monitor pixels, there may be color difference, please refer to the actual product.