This is a wired LAN adapter from BUFFALO. It's a new, unused item, only opened. LUA4-U3-AGTE-NBK I'm selling it because I haven't used it since I bought it. 【What is a wired LAN adapter anyway?】 It's a product that allows wired connections even for game consoles and PCs that don't have a LAN port. 【Plug and play & easy setup】 No driver installation is required for Windows 10/ 8.1 and Nintendo Switch; it works immediately just by plugging it in. You can easily use it on Windows 7, etc., by downloading the compatible driver from our website. 【Enjoy Nintendo Switch even more with a wired connection】 Operation confirmed on Nintendo Switch. Compared to wireless LAN, where communication speed is affected by the environment and surrounding devices, wired LAN allows for stable communication, making online battles more comfortable. 【LED lamp shows the communication status at a glance】 The built-in LED lamp lights up when connected, so you can see the communication status at a glance. 【Compact design convenient for carrying】 It weighs only 26g. Furthermore, it's a compact design that fits in the palm of your hand, so it won't take up much space when traveling or on business trips. 【Compatible models】 PCs equipped with USB3.0/2.0/1.1 interfaces (Windows, Intel CPU-equipped Mac) *Not compatible with USB hubs. 【Standards】 IEEE802.3ab compliant (1000BASE-T), IEEE802.3u compliant (100BASE-TX), IEEE802.3 (10BASE-T) Maximum power consumption: 1.35W, Maximum current consumption: 270mA