Specifications Type:ic Interface:USB Model Number:ACR122U Origin:Mainland China Certification:None Dear, I'm so glad you could visit our store. The company was founded in Shenzhen, Guangdong, China, has an independent research and development team, can solve any card and reader related solutions for you. If you have any questions, please feel free to contact us. We ensure that all products are high quality products, can pass most international standards, at the same time, card readers have CE standards. Support custom printing of 125Khz/13.56Mhz mobile phone stickers, standard cards, key strings and card readers. Whether you buy or not, our team is happy to provide you with technical support and problem solving on card and card reader solutions! I wish you a happy life and best wishes. Due to the version update, the appearance of the product will be slightly changed, please note Specification : Dimensions: 98mm (length) X 65mm (width) X 12.8mm (height) Interface: Full-speed Usb Working Distance: