BUFFALO 8-port switching hub, with AC adapter, LED indicator. LSW5-GT-NS series LSW5-GT-8NS/BK This product is a stylish Giga-compatible switching hub. A switching hub is a device that identifies information between communicating devices and automatically performs appropriate communication, allowing you to connect network-enabled printers, computers, game consoles, TVs, etc., and participate in the network. In designing this product, we considered that the use of switching hubs has expanded beyond just computer peripherals to a wider range of scenes such as living rooms and bedrooms, and we aimed for a stylish design that would not interfere with the interior design wherever it is placed. I am selling this because I am replacing it. It was working fine until a few days ago. No box or instruction manual.