The microchip is a tiny computer chip which has an identification number programmed into it and is encapsulated within a biocompatible material. The whole device is small enough to fit inside a hypodermic needle and can be simply injected under the skin of our pets, where it will stay for the life of the animal. This provides a permanent, positive identification which cannot be lost, altered or intentionally removed - a safe, simple and inexpensive way to protect your pet against loss or theft.