Small dimension and easy to embed into your project Support I2C, SPI and HSU (High Speed UART), easy to change between those modes Support RFID reading and writing, P2P communication with peers, NFC with Android phone Up to 5cm~7cm reading distance On-board level shifter, Standard 5V TTL for I2C and UART, 3.3V TTL SPI Arduino compatible, plug in and play with our shield Size: 43*40mm
