In addition to supporting common access control, elevator card, and water card functions, this device can provide a product development kit for developing membership systems and similar applications. The ACR122U NFC reader is a connected non-contact smart card reader based on 13.56 MHz radio frequency (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, 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 can reach up to 5 cm, depending on the type of non-contact 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 for large events and public transportation, toll collection, and network verification. The ACR122U can be equipped with an optional base. By adjusting the reader to the optimal angle, users can easily tap contactless cards or NFC devices on the reader. 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: Light and display differences may cause slight variations between the item color in the image and the actual product. Measurement may vary by +/- 1-3 cm.