USB Full Speed Interface.You can experience the convenience in using ACR122U, with its compact size and the various features it offers, suitable for applications such as payment, access control, time and attendance, and mass transit. Built-in antenna suitable for contactless tag access, with card reading distance of up to 50 mm (depending on tag type). Supports ISO 14443 Part 4 Type A and B cards, IC Classic, FeliCa, and all four types of NFC (ISO/IEC 18092 tags). The ACR122U is a PC-linked contactless smart card reader/writer developed on the 13.56 MHz contactless technology. By making use of up to 424 Kbps read/write speed suitable for NFC tag access and up to 12 Mbps suitable for USB full speed, ACR122U can efficiently read from and write to various contactless cards/tags. It is also PC/SC-compliant which allows interoperability across different applications and plat suitable forms. Colour: white Material: plastic Package Contents: 1 * Replicator 5 * Key fob 5 * Card Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.