Implantable microchips are cylindrical devices that are implanted in the subcutaneous tissues using a hypodermic needle. The devices are battery-free and sealed in biocompatible glass covered by a sheath to prevent migration. Microchips are activated by a low-power radiofrequency signal emitted by scanners. When activated by the scanner, the microchip transmits a unique, preprogrammed identification number.1,2 Some microchips used in animal research also collect and transmit body temperature data.
Get the facts on microchips in our FAQ and backgrounder.