Contactless smart card

A contactless smart card is a kind of smart card with integrated circuits that can process and save data. Most cards are as big as a credit card. They can receive information which is processed and delivered through radio. There are two main kinds of contactless smart cards. 
Many people believe contactless smart cards have a read-only RFID inside it. This is not true, but they do have a re-writable smart card microchip inside them. Contactless smart cards can be used for identification, authentication, and saving data.