This is the QNAP QNA-T310G1T, a 10Gbps LAN adapter. It uses Thunderbolt 3 and USB4 and is bus-powered! It supports standard LAN cables (RJ45, Category 6a or higher recommended)! You can build a 10GbE environment at a low cost! Supports 10Gbps/10GbE connection! ・For sending and receiving large amounts of data ・For fast access to cloud storage ・For those who want to revel in benchmarks This is a high-spec USB-C LAN adapter that's so good, you probably won't need to buy another LAN adapter for years. It has consistently provided stable, high-speed operation. I purchased this as a new, domestic genuine product on Amazon a little over a year ago. I haven't carried it around, so it's in beautiful condition with no noticeable scratches. It works perfectly, and in my environment, I was able to achieve ultra-fast internet access exceeding 6Gbps (this was the limit in my environment). I think you'll get sufficient speed if you don't make any mistakes with the cable specifications. Compatible with Thunderbolt 3, USB4, and other compatible USB-C ports. There's no problem if you connect it directly to a Mac, but when connecting to a USB hub or a Windows machine, please note that a power supply of around 15W is required. This is a listing for the main unit only. *The evaluation is subjective. Please understand that this is a used item. *Returns are accepted, so please rest assured! (For items not discounted, you will be responsible for return shipping costs. Please consult with us before leaving a review.)