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 Features:Curfew mode set the door to lock and unlock at specified times. It can be set to lock at the same time each dayIncludes 1 RFID collar tag that can be used if your pet is not microchipped (additional tags sold separately in packs of twoStores up to 32 pet identities in memory. Remembers all registered pets even when the batteries have been removedSelective entry any animal can exit. The microchip reader is located on the exterior of the pet door onlyUp to 12 months battery life (4 x C cell batteries not included). A low battery indicator will flash when the batteries need changingManual lock stops your cat leaving or entering the house. Set to in-only to enable your pet to come indoors without being able to get out againWorks with all identification microchips worldwide and SureFlap RFID collar tags. It will work with any microchip3 year warrantyFlap Opening Dimensions: 178mm (W) x 170mm (H) - This dimension is the smallest area of the pet door that your cat or small dog will have to enterDoor/Wall Mounting Dimensions: 207mm (W) x 234mm (H) - The size of hole required to fit your cat flapExterior Frame Dimensions: 262mm (W) x 281mm (H) - Size of the exterior pet door frameGlass Mounting Dimensions: 300mm - A circular hole is required to install the pet door in glass. The optimum hole size is 300mm, but the pet door can be installed into holes up to 320mm in diameterTunnel Depth: 70mm (D) - Depth of the inside tunnel of the cat flap