Features: The MF522-AN module design the circuit of card read by using the MFRC522 chip. Easy to use, low cost, and applicable to equipment development and card reader development etc. Applicable for the user who need to design or manufacture the RF card terminal. The module can be directly loaded into the various reader molds. 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. Specifications: Color: As picture Size: 40*60mm Current :13-26mA / DC 3.3V Idle Current :10-13mA / DC 3.3V Sleep current: <80uA Peak current: <30mA Operating Frequency: 13.56MHz Supported card types: mifare1 S50, mifare1 S70, mifare UltraLight, mifare Pro, mifare Desfire Environmental Operating temperature: -20-80 degrees Celsius Environment Storage temperature: -40-85 degrees Celsius Relative Humidity: 5% -95% Package contains: 1x RFID-RC522 module 1x The standard S50 blank card 1x S50 shaped card 2x Pins Note: Please allow slight dimension difference due to different manual measurement. Please note that slight color difference should be acceptable due to the light and screen.