The ACS ACR122U NFC Reader is a PC-linked contactless smart card reader/writer developed based on the 13.56 MHz Contactless (RFID) Technology. Compliant with the ISO/IEC18092 standard for Near Field Communication (NFC), it supports not only Mifare® and ISO 14443 A and B cards but also NFC and FeliCa contactless technologies.

The ACR122 U NFC Reader is ideal for both secure personal identity verification and online micro-payment transactions. Other applications of the ACR122U include access control, e-payment, e-ticketing for events and mass transit, toll road fare collection and network authentication.

Features:
- CCID-compliant
- PC/SC-compliant
- Read/write speed up to 424 kbps
- Built-in antenna for contactless tag access, with card reading distance of up to 50 mm (depending on tag type)
- Supports ISO 14443 Type A and B, Mifare, FeliCa, and all 4 types of NFC (ISO/IEC 18092) tags
- Supports new Mifare Ultralight C (via pseudo APDUs) and Mifare Plus SL1 (4 Byte UID, via pseudo APDUS) and SL3
- Built-in anti-collision feature (at least 1 card is detected when multiple cards are presented)
- USB PnP
- User-controllable bi-color LED


- Compatible with Linux, Mac OS X and Windows.