The Staywell Smart Flap microchip cat flap is designed to give your pets easy access to the outside world while preventing unwanted, stray cats from entering. Your pets do not need to wear collars or accessories for this. The cat flap reads the unique identification number on the microchip that your veterinarian has implanted in your cat and only opens for registered animals. With the help of a timer function, you can set the locking and unlocking at specific times of the day. The flap can be programmed with up to 25 microchips.