In addition to supporting common access control, elevator cards, and water cards, this device can provide a product development kit for developing membership systems. The ACR122U NFC reader is a contactless smart card reader based on 13.56 MHz RFID technology. It complies with the ISO/IEC 18092 Near Field Communication (NFC) standard and supports IC cards, ISO/IEC 14443 Type A and Type B cards, and all four types of NFC tags. Due to compliance with PC/SC standards, the 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 424 kbps, enabling faster and more efficient read and write operations. The operating distance of the ACR122U can reach up to 5 cm, depending on the type of contactless tag. To enhance security, the ACR122U can be integrated with a 7816-3 card slot. Additionally, the ACR122U NFC reader is available in module form, making it easy to integrate into larger systems such as POS terminals, access control systems, and vending machines. The ACR122U NFC reader is suitable for personal identity authentication and online micropayment transactions. It can be widely used in access control, electronic payment, electronic ticketing (large events and public transportation), toll collection, and network verification. The ACR122U can be equipped with an optional base. By placing the reader at an optimal angle, users can easily tap contactless cards or NFC devices on the ACR122U. Application areas include online banking, online shopping, e-commerce, e-wallet balance inquiry, network access, customer loyalty programs, identity verification, ticketing, parking management, toll collection systems, public transportation, access control, attendance systems, vending machines, contactless public telephones, logistics, and supply chain management. Color: white Material: plastic Package Contents: 1 x NFC card reader Note: The package includes only the items listed above. Other products are not included. Note: Lighting and display differences may cause slight variations between the color of the item in the image and the actual product. Measurement allows an error of +/- 1-3 cm.