RFID electronic tag is also called radio frequency tag, radio frequency identification, etc. It is a non-contact automatic identification technology, which identifies the target object through radio frequency signals and obtains relevant data without manual intervention. As a wireless version of bar code, RFID technology has the advantages of waterproof, antimagnetic, high temperature resistance, long reading distance, encrypted tag data, large storage capacity, and freely changeable stored information. The picture shows the detailed introduction of RFID.