The module use a voltage of 3.3V, it can connected communication with user's any CPU mainboard through several lines of SPI interface, it can ensure stable and reliable work, and reader distance. Current: 13-26mA/DC 3.3V; Idle Current: 10-13mA/DC 3.3V; Data Transfer Rate: Max.10Mbit/s; Power Voltage: 3.3V; Operating frequency: 13.56MHz, MFRC522 Supports MIFARE series higher-speed contactless communication, bidirectional data transmission rate up to 424kbit/s RFID RC522 Module is a better choice for the development of smart meters and portable handheld devices, the module can be directly loaded into the various reader molds. RC522 is a highly integrated contactless (13.56MHz) card reader chip, applicable for the user who need to design or manufacture the RF card terminal. The module can connected communication with user's any CPU mainboard through several lines of SPI interface, it can ensure stable and reliable work, and reader distance This module can be directly loaded into the various reader molds.
Operating current :13-26mA/DC 3.3V
Module interfaces SPI: Data transfer rate maximum 10Mbit/s
Module uses voltage of 3.3V, through the SPI interface simple few lines can be directly connected to the user any CPU board communication module stable and reliable work

It can connect various development boards and support development resources
This module can be loaded directly into a variety of readers molds.
Operating Frequency: 13.56MHz
Idle current :10-13mA/DC 3.3V
Sleep current: <80uA
Peak current: <30mA

Reference
https://randomnerdtutorials(Dot)com/security-access-using-mfrc522-rfid-reader-with-arduino/
https://www.youtube(Dot)com/watch?v=nn-nuhAByRk
https://pimylifeup(Dot)com/raspberry-pi-rfid-rc522/
https://github(Dot)com/miguelbalboa/rfid

Package include:
6 x RFID Kit