The board allows reading and writing data from RFID devices at a frequency of 13.56 MHz. The module is based on the PN532 system, is powered by 3.3V or 5V, communicates via SPI or I2C. Technical Data: Power supply: 3.3V - 5V It supports reading and writing RFID 13.56MHz and NFC SPI, I2C protocols Range - 0 - 50mm https://elecena.pl/product/24578670/13-56-mhz-spi-pn532-rfid-card-reader-module 2023-12-05 https://elecena.pl/product/24578670/13-56-mhz-spi-pn532-rfid-card-reader-module 2025-10-29