USB Full Speed Interface. Experience the versatility of the ACR122U, with its compact size and diverse functions, ideal for applications like payment, access control, time and attendance, and transportation. Built-in antenna for contactless tag access, with a card reading distance of up to 50mm (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 13.56 MHz contactless technology. Utilizing up to 424 Kbps read/write speed for NFC tag access and up to 12 Mbps for USB full speed, the ACR122U can efficiently read from and write to various contactless cards/tags. It is also PC/SC compliant, enabling interoperability with different applications and platforms. Color: white Material: plastic Package Contents: 1 * Replicator 5 * Key 5 * Card Only the above package content, others are not included. Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.