Radio frequency identification (RFID) is a wireless communication technology, which can identify specific goals and read or write data via radio signals and no need to establish mechanical or optical contact between identification system and specific goals.

RFID is constituted by RFID tag, reader, antenna and system.

RFID tag component is the coupling components and chips, each tag has a unique electronic code, high-capacity electronic labels user-writable storage space, attached to the object identifies the target object, commonly known as RFID tag.