J4210N NFC Reader and Writer Unlike ACR122U, this product is different. ACR122U does not supply you a working software, it has an SDK, so you have to write your own software. But this product is complete. With hardware it comes with open source SDK and working demo in three popular platforms.This product is sold by a real company which manufactured the product. You may visit the manufacturer web site https://jence.com. This is not a third party product which some other vendor sells through Amazon. This product is Brand New.The J4210N is a PC-linked Contactless Smart Card (NFC) Reader/Writer developed on the 13.56MHz Contactless Technology. Supports both ISO 14443 and ISO 18092, MiFare, ISO 14443 Type A and B, 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. NFC mobile tag, access control, time attendance and so on.Specification Condition: 100% Brand New Item Type: Desktop Reader Color: Dark Grey | Beige Enclosure Material: 3D Printed PLA Working Frequency: 13.56MHz Protocol: ISO14443 Antenna: pcb loop antenna Read Distance: 5cm max Writing Distance: 6 inch max Power: DC+5V Working Temperature: -20 to 55 C Storage Temperature: -40 to 85 C Communication Interface: USB Serial Power Adapter: USB Development Kit: Open source SDK Platforms: Windows, Mac OS X and Linux Packing List 1 Desktop Reader 1 1m Data Cable 1 UHF tag