In addition to supporting common access control, elevator card, and water card functions, this device provides a product development kit (SDK) for developing membership systems and similar applications. The ACR122U NFC reader is a USB-connected, 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 14443 Type A and Type B cards, as well as all four types of NFC tags. Compliant with PC/SC standards, the ACR122U is a plug-and-play USB device that supports interoperability with multiple devices and applications. It features a USB full-speed interface (12 Mbps) and supports data transfer speeds of up to 424 kbps, enabling fast and efficient read and write operations. The operating distance can reach up to 5 cm, depending on the type of contactless tag. To enhance security, the ACR122U can be integrated with an ISO 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 ideal for personal identity authentication and online micropayment transactions. It is widely used in access control, electronic payment, electronic ticketing (for large events and public transportation), toll collection, and network authentication. The ACR122U can be equipped with an optional base. Placing the reader at an optimal angle allows users to easily tap contactless cards or NFC-enabled devices on the reader. Application areas include online banking, online shopping, e-commerce, e-wallet balance inquiries, network access, customer loyalty programs, identity verification, ticketing, parking management systems, automated toll collection, 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 settings may cause slight variations in the color of the item as shown. Measurement may vary by +/- 1-3 cm.