4Way Locking System Our cat flap provides four locking modes via knobstyle locks: open, locked, inonly (cat can enter but not exit), and outonly (cat can exit but not enter). This allows you to control your pet's access through doors or walls and keep rooms covered as needed. Noise Reduction Designed with a brush strip to reduce noise when your cat passes through. The quiet action helps prevent startling pets and minimizes disturbance for household members. Size Options Available in three sizes to fit different installations: M: 19 x 5.5 x 22 cm L: 23.5 x 5.5 x 27 cm XL: 25 x 5.5 x 29.5 cm Suitable for installation on doors and thin walls. Choose the size that matches your door thickness and your pet's dimensions. Easy to Install Includes stepbystep installation instructions inside the sales box. Follow the notices and prepare the tools for a straightforward setup. The tunnel depth can be shortened to fit your installation needs. Use Scenarios Control access in shared living spaces: keep bedrooms or restricted areas closed while still enabling your cat to come and go from common rooms. Manage multiple entry points: use the 4way lock to allow entry only, exit only, or both as needed for pets and household activities. Ideal for doors or thin walls in apartments or homes with limited space: select the appropriate size (M, L, or XL) to fit the application and pet size.