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RC522 RFID Reader Module Serial 13.56mhz IC Card Reader MFRC522 RF Module UART TTL Interface for Arduino and Raspberry Pi. US $4.27. US $5.08. 16% off. + Shipping: US $3.56. Worldchips. 13.56MHz I2C/SPI RFID Wireless Module For Arduino MF RC522 RC-522 Reader Writer Sensor Card Module 2 Pins 3.3V DC. US $0.78.
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