Sureflap is a revolutionary battery powered cat flap which reads your cats existing identification microchip only unlocking for them up to 32 microchip numbers can be stored in the device memory so it is perfect for multi pet homes there is a simple one button learn process that you perform once for each of your pets the programmed numbers work like electronic door keys and once programmed the sureflap cat flap will only unlock if it recognises your pets microchip number stray cats and