Features:
Entry operated by your cats implanted microchip - keeps stray pets and wildlife outEasy to program all common microchips - registers up to 30 catsSuitable for most cats with larger 145mm (w) x 145mm (h) flap openingEasy to use, rotary 4-Way lock for controlled entry and exitRequires 4 x AA batteries (not included) which will give approximately 12 months operation