Like other "proximity card" technologies, NFC employs electromagnetic induction between two loop antennas when NFC-enabled devices-for example a smartphone and a printer-exchange information, operating within the globally available unlicensed radio frequency ISM band of 13.56 MHz on ISO/IEC 18000-3 air interface at rates ranging from 106 to 424 kbit/s.
NFC reader/writer-enables NFC-enabled devices to read information stored on inexpensive NFC tags embedded in labels or smart posters.