Four locking modes allow flexible control - Four locking modes: open, closed, entry-only, or exit-only. This lets your cat enter and exit as it likes while you retain control of overall access. Wide compatibility across surfaces - This magnetic pet door is suitable for windows, glass doors, brick walls, PVC doors, uPVC and metal doors. Durable construction and easy maintenance - Made of ABS plastic for durability, resistant to scratching by your cat or small dog. Easy to clean and suitable for long-term use. Convenience and pet freedom without worry - With this cat flap you can control your pet's coming and going and free your time to open the door without worrying about your pet. At the same time your pet will love a larger, more open living space. Practical use scenarios - Scenario 1: Install on a glass door or window to give your cat access to indoor and outdoor areas while you manage entry and exit with the locking modes. - Scenario 2: Mount on brick walls, PVC doors, uPVC or metal doors to provide pet access to a sunroom, yard, or balcony, expanding your pet’s roaming space. - Scenario 3: In a multi-pet home with cats and small dogs, use the appropriate locking mode to regulate traffic and maintain convenient access for each pet.