13.56MHz RFID/NFC Card Adafruit 13.56MHz RFID/NFC Card is a blank radio-frequency identification tag, based on the NXP Semiconductors NTAG203 NFC Forum Type-2 compliant IC. RFID uses electromagnetic fields to automatically identify and track tags attached to objects. The tag contains the RFID chip and an antenna which is passively powered by the reader/writer when placed a couple of inches away. The RFID/NFC Card can be read by any 13.56MHz RFID/NFC reader using the ISO/IEC 14443 Type-A standard.