Keep your home secure and give your pet the freedom they deserve with the SureFlap Microchip pet door. Using smart RFID microchip technology, it recognises your pet and keeps unwanted visitors out. It's compatible with all standard veterinary microchips and meets UK legal requirements. Plus, it can store up to 32 pets as is perfect for homes with large cats or small dogs. And registering your pet is quick and easy with one-button setup - just press and go. Good to know - The selective entry using the pets implanted RFID microchip lets any pet leave, but only recognised ones can return - It runs for up to 12 months on four C cell batteries (not included), with a flashing low battery indicator for convenience - A manual 4-way lock gives you full control and lets you override the automatic settings for extra peace of mind