5Pcs 3.3V RC522 Chip IC Card Induction Module RFID Reader 13.56MHz 10Mbit/s Geekcreit for Arduino - products that work with official Arduino boardsDescription: RC522 chip: MF RC522 is applied to the highly integrated read and write 13. 56MHz contactless communication card chip, NXP launched by the company for the "table" application of a low voltage, low cost, small size of the non contact card chip to read and write, smart meters and portable handheld devices developed better choice. The MF RC522 use of advanced modulation and demodulation concept completely integrated in all types of 13. 56MHz