RC522 - RFID Reader / Writer 13.56MHz with Cards Kit includes a 13.56MHz RF reader cum writer module that uses an RC522 IC and two S50 RFID cards. The MF RC522 is a highly integrated transmission module for contact-less communication at 13.56 MHz. RC522 supports ISO 14443A/MIFARE mode.
RC522 - RFID Reader features an outstanding modulation and demodulation algorithm to serve effortless RF communication at 13.56 MHz. The S50 RFID Cards will ease up the process helping you to learn and add the 13.56 MHz RF transition to your project.
The module uses SPI to communicate with microcontrollers. The open-hardware community already has a lot of projects exploiting the RC522 – RFID Communication, using Arduino.
RC522 - RFID Reader / Writer Features:
    Integrated MF RC522
    13.56MHz contactless communication card chip.
    Low-voltage, low-cost, small size of the non-contact card chip to read and write.
    Suitable for Smart meters and portable handheld devices.
    Advanced modulation and demodulation concept completely integrated in all types of 13.56MHz passive contactless communication methods and protocols.
    14443A compatible transponder signals.
    ISO14443A frames and error detection.
    Supports rapid CRYPTO1 encryption algorithm, terminology validation MIFARE products.
    MFRC522 support MIFARE series of high-speed non-contact communication, two-way data transmission rate up to 424kbit/s.
    Low cost, and ideal for user equipment development.
    The reader and RF card terminal design meets advanced applications development and production needs.
    Can be directly loaded into the various reader molds, very convenient.

RC522 - RFID Reader / Writer 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
    Supported card types: mifare1 S50, mifare1 S70 MIFARE Ultralight, mifare Pro, MIFARE DESFire
    Environmental Operating Temperature: -20 - 80 degrees Celsius
    Environmental Storage Temperature: -40 - 85 degrees Celsius
    Relative humidity: relative humidity 5% - 95%
    Reader Distance: ? 50mm / 1.95" (mifare 1)
    Module Size: 40mm × 60mm
    Module interface: SPI
    Data transfer rate: Maximum 10Mbit/s

For More Details on PC Click here

For More Details on Portables Click here.