MIFARE contactless card technology introduced in 1994 was primarily used for transport passes, later due to its flexible technological aspects scaled to access control, government, health, hospitality sectors etc.

They comply with ISO14443A industry-standard requirements and, like other contactless cards, use an internal antenna and chip that reacts once a card is within the magnetic field of a reader. They operate at  13.56MHz frequency and are made by NXP Semiconductors.