Swing Microchip has a special antenna that senses and reads the microchip implanted in your cat so the door unlocks when the cat approaches. It can register up to 32 ISO 11784 standard microchips and has been specially created and tested for worldwide use. Registering the microchip's code is quick and easy, just let the cat approach and press the memory button to save the code. Swing Microchip can be installed in wooden doors, glass doors and walls. The hatch has a wind stopper system and the sp