- Size and fit: S is 11.8 x 1.6 inches; M is 17.3 x 6 inches. Fits all breeds of cats and some small dogs, suitable for cats up to 20 pounds. - 4-way locking: Cat flap with double button lock offers four modes: open, locked, only one (cat can enter but not exit), and only off (cat can exit but not enter) to control pets entering and leaving the home. - Durable and weather-resistant: Made from durable PC plastic and designed to resist weather conditions, providing reliable performance in indoor or outdoor use. Practical and user-friendly. - Quiet and safe operation: The two-part door with a flap includes a brush strip that reduces noise when closing and protects your cat from injury. - Practical and reliable design: Built for everyday pet access with a focus on function, compatibility, size, material, and performance. Use scenarios - Household with multiple pets: Use the four-way lock to let your cat enter while preventing dogs from entering, or vice versa. - Nighttime control: Keep pets indoors by using locked or only-in modes to restrict outside access during the night. - One-way access for safety: Use only-in mode to allow a cat to enter a room but prevent it from exiting, ideal for securing a pet in a specific area.