This RFID module based on MFRC522 IC can read and write MIFARE tags. The microcontroller and card reader uses either SPI or I2C for communication. The card reader operates at 13.56MHz.
This module supports MF1xxS20, MF1xxS70 and MF1xxS50 tags. It also supports contactless communication and uses MIFARE higher transfer speeds up to 848 kBs in both directions.
The physical design is compact and have small size at 36x36mm only. 3.3V and 5V power supplies are both possible. This makes it easy for connecting to a board with 5V, no need for 3.3V power regulator.
The antenna is built into the board, and has good sensitivity up to a height of 25mm.
*Note: tags not included.