When implanted under the skin, the microchip sits motionless. It does not have a battery or any other power source so it is completely passive. When scanned with a microchip scanner, the scanner emits a low frequency radio signal that activates the microchip. The Pet ID Microchips then transmits the identification number back to the scanner so it can be displayed. The vet or shelter s... https://www.newswirestats.com/pet-id-microchips-unleashing-the-power-of-pet-microchips-enhancing-pet-identification-and-recovery-growth-and-share-analysis-demand-trends-foreast-size/