NTAG213 RFID cards are a type of contactless smart card powered by NFC (Near Field Communication) technology. Developed by NXP Semiconductors, these cards are widely used in various applications due to their versatile features and affordability. NTAG213 cards typically operate at 13.56 MHz and comply with the ISO/IEC 14443A standards, making them compatible with most NFC devices, including smartphones and NFC readers.