Simple installation steps: it can be done on wooden or PVC doors. Adapters required for brick walls, glass and patio doors Adapts to various climatic conditions: thanks to its weatherproof strip and improved automatic double locking function, wind or heat stays away the outdoors Give your dog or cat greater freedom: this allows you to offer your dog or cat maximum freedom; it's an ideal solution for letting cats and dogs enter 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 cat flap is robust and durable, thanks to its hard transparent plastic blade and high quality durable plastic frame; door fits 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. two-way. (3) Allow cats to exit, but do not 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 We will do our best to provide you satisfactory service