Specifications Hign-concerned Chemical:None Type:ic Interface:USB Model Number:ACR122U Origin:Mainland China Certification:CE Due to the version update, the appearance of the product will be slightly changed, please note Features: 100% Brand new and high quality! USB 2.0 Full Speed Interface CCID Compliance 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, FeliCa, and all 4 types of NFC (ISO/IEC 18092) tags Supports for Mifare Ultralight C (via pseudo APDUs) and for Mifare Plus SL1 (4 Byte UID, via pseudo APDUS) and SL3 Supports all 3 modes of NFC: reader, card emulation and peer-to-peer modes Built-in anti-collision feature (at least 1 card is detected when multiple cards are presented) USB PnP Application: 1. Network access control 2. Bank&paymen 3. NFC mobile ta 4. Public transportation terminal 5. Automatic fare collectio 6. Physical access contro 7. Customer loyalt 8. Time and attendanc 9. Contactless public phone 10. Vending machine Specifications: Dimension: 98 mm (L) x 65 mm (W) x 12.8 mm (H) Interface: USB Full Speed Operating Distance: