Brand Elecfreaks Model NFC RFID Starter Kit Quantity 1 Color White + black Material FR4 Features RFID/NFC technology is regulated by Near Field Communication Forum which standardizes NFC communication between devices -- how they pair share data and allow a secure transaction to happen.NFC Forum develops and certifies device compliance with NFC standards. NFC operate on ISM band of 13.56 MHz Frequency. NFC communication range is up to 10 cm. But this is limited by the antenna and power radiation design. Most devices work within a range of 10mm. NFC Shield antenna is designed to work within a range of 1cm. NFC Shield provides all necessary circuitry for PN532 like 27.12Mhz crystal power supply. It also beaks-out the I/O pins of PN532 for easy access Specification Features Arduino Shield compatible; No soldering required; SPI interface; Hence most Arduino pins are available for other applications; Built in PCB Antenna; Supports both 3.3V and 5V operation; Socket to connect other shields Application NFC / RFID wireless technology development and learning English Manual/Spec Yes Packing List 1 x Freaduino UNO 1 x NFC Shield 4 x Pin Headers 3 x Keys 1 x Door card 1 x USB cable (22cm) 1 x Wrist key