In addition to duplicating common access control, elevator cards, water cards and other functions, this device can provide product development kit SDK for the development of membership systems, etc. ACR122U NFC reader is a connected non-contact smart card reader based on 13.56 MHz non-contact (RFID) technology. It complies with the ISO/IEC18092 Near Field Communication (NFC) standard, supports IC cards, ISO 14443 Type A and Type B cards, and all four NFC tags. Due to compliance with CCID and PC/SC standards, ACR122U is a plug-and-play USB device that can interoperate with multiple devices and applications. It uses a USB full-speed interface (12 Mbps) with an access speed of up to 424kbps, allowing faster and more efficient read and write operations. In addition, the operating distance of ACR122U can reach up to 5 cm, depending on the type of non-contact tag. In order to improve the security level, ACR122U can be integrated with ISO 7816-3 SAM card slot. In addition, the ACR122U NFC reader can also be provided in the form of a module, which is easy to integrate into larger devices such as POS terminals, access control systems, and vending machines. ACR122U NFC reader is an perfect product for personal identity security authentication and online micropayment transactions. It can be widely used in applications such as access control, electronic payment, electronic ticketing (large events and public transportation), highway toll collection, and network verification. ACR122U can be equipped with optional base. By placing the reader at the best angle, users can easily swipe contactless cards or NFC devices on the ACR122U. Application scope: online banking and online shopping, e-commerce, e-wallet balance inquiry, network access, customer points discount, identity verification, ticketing, online gambling, parking lot charging system, automatic toll collection system, public transportation, access control system, Attendance, vending machines, contactless public telephones,