The Sureflap Large Microchip Pet Door is larger in size than the standard SureFlap cat flaps and is designed for large cats and small dogs with all the same great features on offer - and more!Sureflap Large Microchip Pet Door is suitable for Cats & Small Dogs and has a flap opening of 178mm (W) x 170mm (H). This dimension is the smallest area of the cat flap that your cat or small dog will have to enter through.Key Benefits Larger in size than our cat flaps, the pet door is designed for large cats and small dogs Curfew mode set the door to lock and unlock at specified times. It can be set to lock at the same time each day Includes 1 RFID collar tag that can be used if your pet is not microchipped (additional tags sold separately in packs of two Stores up to 32 pet identities in memory. Remembers all registered pets even when the batteries have been removed Selective entry any animal can exit. The microchip reader is located on the exterior of the pet door only Up to