The ACR122U is a PC-linked Contactless Smart Card Reader/Writer developed on the 13.56MHz Contactless Technology. It is the world's first CCID-compliant contactless card reader writer that follows both ISO 14443 and ISO 18092. It is designed to support not only MiFare and ISO 14443 Type A and B cards but also FeliCa and NFC tags. By making use of high-speed card access and full USB speed of 12 Mbps, Read & Write operations are faster and more efficient. The ACR122U NFC Reader is also PCSC compliant for ISO 1443 tags and MiFare cards. With its compact size and trendy design and with various features, you can experience the convenience in using ACR122U for applications of payment, NFC mobile tag, access control, time attendance and so on. ACR122U is truly the smart card peripheral for your contactless application. Features: * Operating Frequency: 13.56MHz * Interface: USB full speed * Power Supply: direct USB (5V DC) * CCID Standard, PSCS Compliant * Read / Write Speed up to 424kbps * ISO/IEC 18092 (NFC) and FeliCa Tag Support * ISO14443 Type A and B and MiFare card support * Bi-Color LED * Compact size: 98mm(L) x 65mm(W) x 12.8mm(H) * Net Weight: 70g Package includes: 1x ACR122U reader 1x Mini CD (SDK, Driver Installer, Sample Codes, User Manual) 5x Writable IC cards.

Device support: Supports new Mifare Ultralight C (via pseudo-APDU) and Mifare Plus SL1 (4-byte UID, via pseudo-APDU) and SL3. Supports NFC types: ISO 14443 Type A and B, Mifa, FeliCa and all 4 types of NFC (ISO/IEC 18092) tags. High-speed reading and writing: Read/write speeds up to 424 kbps. Reading distance up to 50 mm (depending on tag type). Usage restrictions: It is only suitable for 13.56MHz frequency. It is not suitable for other frequencies. USB interface, compliant with CCID/PCSC standards. Professional equipment: No software is provided, you must obtain third-party applications/software to use it.