Support NFC RFID reading and writing, P2P communication with peers Support I2C, SPI and HSU (High Speed UART), easy to change among these modes On-board level shifter, standard 5V TTL for I2C and UART, 3.3V TTL SPI Arduino Raspberry Pi compatible, Small Size and easy to embed into your project RFID reader/writer supports: Mifare 1k, 4k, Ultralight, and DesFire cards, ISO/IEC 14443-4 cards such as CD97BX, CD light, Desfire, P5CN072 (SMX), Innovision Jewel cards such as IRT5001 card, FeliCa cards such as RCS_860 and RCS_854