This is a MiFare Classic Sticker - often used for electronic locks or customer identification. The tag contains a NXP S50 chip and an antenna, and is passively powered by the reader/writer when placed a couple inches away.
Canada Robotix, operated by CAROBOTIX INC., is an online and physical retail store that sells parts and components to make your robotics project possible. Our products and resources are here to help with your robotic adventures. We love robotics!