This is the XikeStor 10GbE adapter "SKN-U310GT". It's a 10Gbps USB-LAN adapter equipped with a Realtek RTL8159 (RTL8127) chip. This is a new product, just released, and comes in a retail package with a box. Only a connection test was performed to avoid initial defects. The included USB cable is approximately 30cm long. Please use USB 3.2 Gen2x2 or higher to communicate at 10Gbps. Drivers can be found on the following official website: https://www.realtek.com/Download/List?cate_id=585 Although it is new and should be problem-free, please purchase this item only if you are able to handle any potential issues yourself and have sufficient knowledge of PCs. Please be aware that we cannot accept returns or refunds. We do not offer support for beginners, but we will answer technical questions as much as possible. It will be securely packaged with air cushioning and shipped via Takkyubin Compact within 24 hours. We will respond quickly and carefully. Thank you.