1. 4Way Locking The cat flap uses knobstyle locks with four modes: open, locked, inonly (cat can enter but not exit), and outonly (cat can exit but not enter). This provides precise control over your pet's access and helps tailor entry and exit to routines or household needs for the youthink pet door. 2. Durable and EnergySaving Frame is made from ABS material for strength and durability. The flap is weatherproof and designed to improve energy efficiency, helping to reduce drafts and protect against extreme weather. 3. Cat Door Versatility Suitable for installation on interior doors, exterior doors, walls, cupboards, and glass. Once installed, it simplifies daily life by saving you trips to open doors and by controlling your cat's entry and exit. 4. Noise Reduction Equipped with a brush strip to minimize noise when pets pass through. The quiet operation prevents startling pets and reduces disturbances for the household. Use scenarios Nighttime control in a multipet home: set to inonly to let your cat in while keeping the door closed to prevent wandering after dark, or use outonly to allow the cat to exit without letting others in. Energyconscious households in cold climates: keep the flap in closed or inonly mode to limit drafts while still providing convenient access for your cat. Rooms with restricted access: install on interior or exterior doors to grant pet access only when desired, preserving separation between living areas and pets.