About RC522 Chip
1. MFRC522 is a highly integrated read and write chip which is applicable to 13.56MHz contactless communications.
2. It is a non-contact read and writer card chip, low voltage, low cost and small size, is a better choice for smart meters and portable handheld devices development.
3. MF RC522 completely integrated in all types of 13.56MHz passive contactless communication methods and protocols.
4. Support 14443A compatible transponder signals. The digital part handles ISO14443A framing and error detection. In addition, support fast CRYPTO1 encryption algorithms, terminology validation MIFARE products.
5. The sensor module can be directly loaded into the various reader molds.Applicable for the user who need to design or manufacture the RF card terminal

Specifications:
Operating current :13-26mA/DC 3.3V
Idle current :10-13mA/DC 3.3V
Sleep current:
Peak current:
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:
4 * RFID-RC522 Module
4 * S50 Blank IC Card
4 * S50 Key Ring
8 * Pin Headers