USB Full Speed Interface.You can experience the in using ACR122U, with size and the features it offers, for applications such as payment, access control, time and attendance, and transit. Built-in antenna for contactless tag access, with card reading distance of up to 50 mm (depending on tag type). Supports 14443 Part 4 Type A and B cards, IC Classic, FeliCa, and all four types of NFC (/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 for NFC tag access and up to 12 Mbps for USB full speed, ACR122U can efficiently read from and write to contactless cards/tags. It is also PC/-compliant which allows interoperability different applications and platforms. 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.