The ACR122U NFC Reader is a PC-linked contactless smart card reader/writer developed based on 13.56 MHz .Contactless (RFID) Technology.This reader with small shape, easy to carry,compliant with both CCID and PC/SC. It supports not only MF and ISO 14443 A and B cards, but also all four types of NFC tags. The ACR122U NFC Reader is ideal for both secure personal identity verification and online micro-payment transactions.Other applications of the ACR122U include access control, e-payment, e-ticketing for events and mass transit, toll road fare collection and network authentication.