demareth:cernoid-leporidae:Mostly likely an RFID tag. A simple unpowered device that emits a signal when excited by an external magnetic field. The fun part is that RFID chips are incredibly easy to break, and incredibly easy to clone/copy. Imagine buying
tags: That guy, from FF,
from: https://0nigum0.tumblr.com/post/658582347504091136