Reads your cat’s microchip to keep intruder animals out DualScanTM technology lets you set exit permissions for each cat Connect ready - add the Hub (sold separately) to use the Sure Petcare app Via the app lock/unlock the cat door remotely and change curfew times Monitor your pet's long-term activity and spot changes The SureFlap Microchip Cat Door Connect is the most advanced cat door ever. The SureFlap hub is required to enable you to stay connected to your cat wherever you are, lock and unlock the door remotely and set different exit permissions for each cat. These permissions can be changed easily at any time. The cat door connects to the Sure Petcare app via the Hub, which is sold separately. The Sure Petcare app lets you know when your cat enters or leaves the house and sends a notification when an intruder has tried to get in. The product is battery powered (4 x AA batteries not included), stores up to 32 pets and can be installed in doors, windows and walls.