Suitable for assembly on doors and walls can be programmed up to 15 patented cats and designed by veterinarians it works with all animals that carry European microchip (FDX-B, according to ISO 11784/11785) or identification number (identification number of 12 12 Digit + 3 -digit country code = 15 digits), chips can be purchased at veterinary consultations Advantages: It is no longer necessary acoustic when the cat veterinary mode enters