Adafruit NTAG213 (13.56MHz RFID/NFC) Clear Keychain Fob

This 13.56MHz RFID/NFC Keychain Fob comes equipped with an NTAG213 chip, offering seamless integration for systems requiring proximity cards. The durable chip is often used for train passes, information sharing, and contactless payments due to its ability to communicate with a wide range of readers.

Each fob contains a compact RFID chip and an antenna, passively powered by the reader when in proximity. Suitable for any 13.56MHz RFID/NFC reader handling ISO/IEC 14443 Type A cards, it stands out for its compatibility and versatility in various applications.

The NTAG213 chip can store up to 144 bytes of data and supports over 10,000 data rewrites. Use tools like the PN532 NFC/RFID breakout board or Adafruit NFC/RFID Shield for Arduino to manage data easily. An unchangeable 7-byte serial number adds an extra layer of identification, distinguishing each tag uniquely.

With an NTAG chipset, these 'Type 2' tags effectively function with nearly any smartphone, providing a secure and patent-issue-free alternative to MiFare Classic 1K cards. This makes the fob an essential tool for users needing reliable and secure RFID solutions in a pocket-sized form factor.