About RFID Module The original Philips MFRC522 chip design circuit card reader is easy to use and low cost, and applies to the user equipment development, The reader and the development of advanced applications, and the need for the user RF card terminal design/production. This module can be directly loaded into various reader modules. It utilizes a voltage of 3.3V, through the SPI interface with simply a few wires. Directly connected with a CPU motherboard, the module can work in a stable and reliable manner as a distance card reader.Specifications: Operating current :13-26mA/DC 3.3V Idle current :10-13mA/DC 3.3V Sleep current: <80uA Peak current: <30mA Operating Frequency: 13.56MHz Read Range: 0 ~ 35mm (mifare1 card) Size: 40mm×60mm Environmental Operating temperature: -20-80 degrees Celsius Environmental Storage Temperature: -40-85 degrees Celsius Relative humidity: relative humidity 5% -95% Module interfaces SPI: Data transfer rate maximum 10Mbit/s Supported card types: Mifare1 S50, Mifare1 S70, MIFARE Ultralight, Mifare Pro, and MIFARE DESFire. Package included: 1 * RFID RC522 module 1 * RFID key fob 1 * RFID Card