RF proximity card.
Automatic identification of the user by radio-frequency (RF), MIFARE. Passive card, when in proximity to the reader is activated by magnetic induction. When activated (electromagnetic induction) it returns a code to the system so requires no battery.
Communicates with the reader via an RF antenna at 13.56MHz.
It is made of PVC and has the size of a credit card, which makes it easy to fit in any card holder or wallet. It can be used in card printers for customization of both sides.