Features:

1. Support II2, SPI and HSU (High-Speed UART)
2. I2C / UART: 3.3V ~ 24V TTL
3. SPI: 3.3V TTL with 100-ohm resistors in series
4. Communication distance: 5cm~7cm
5. On-board level shifter, Standard 5V TTL for I2C and UART, 3.3V TTL SPI
6. Work in NFC Mode or RFID reader/writer Mode
7. RFID reader/writer supports:
8. Plug and play, compatible
9. Built-in PCB Antenna, with 4cm~6cm communication distance
10. On-board level shifter, Standard 5V TTL for I2C and UART, 3.3V TTL SPI
11. Work as an RFID reader/writer
12. Work as a 1443-A card or a virtual card
13. Exchange data with other NFC devices such as a smartphone