Cat microchipping is a simple procedure. Your veterinarian simply injects a microchip, about the size of a grain of rice (12mm), beneath the surface of your cat's skin between the shoulder blades. The process is similar to a routine injection, and takes only a few seconds. No anesthetic is required. A HomeAgain microchip is permanent pet ID and it will last the life of your cat. It is read by passing a microchip scanner over the cat's shoulder blades. The scanner emits a low radio frequency that provides the power necessary to transmit the microchip's unique cat or dog ID code and positively identify the pet. If your cat gets lost and is taken to an animal shelter or veterinarian, they will scan the microchip to read its unique ID code. This is the number used by HomeAgain to identify the pet and retrieve your contact information, which is used to contact you and reunite you with your cat.