A scanner is a device used to read a compatible microchip. It may be a small, hand held device or a larger “walk through” type. It activates the microchip in the pet and displays the unique number in its window or computer display, working through hair, fur, feathers, glass, plastic, wood and many other materials. It is important that the scanners used in your area and the chip in your pet are compatible. We strongly recommend the newer 15 digit numeric code for all new chip insertions, as these are more universally readable. Various countries also promote this standard as the one of choice for entry procedures. It is likely to become the universal standard.