The UGREEN 20254 USB-A to RJ45 Wired Ethernet Adapter is an essential accessory designed to bring the stability and speed of a wired network connection to devices lacking a built-in Ethernet port. This lightweight, portable adapter allows you to connect your Ultrabook, notebook, or Macbook Air to a router, modem, or network switch, ensuring a fast and reliable internet experience. For users who rely on stable connectivity—such as online gamers, remote workers, or students—the UGREEN 20254 offers a significant upgrade over potentially unstable Wi-Fi connections. By providing a direct wired link, it helps avoid Wi-Fi interference and potential loading issues, ensuring smooth performance for online gaming, video conferencing, and HD video streaming. Performance-wise, the adapter supports up to 100Mbps network speed, providing full performance for tasks like online gaming, meetings, class, and high-definition video streaming. It is designed to offer fast and stable Ethernet performance, even when connected to a USB 2.0 equipped computer. The adapter is highly compatible, making it useful for various devices, including the Nintendo Switch and Nintendo Switch OLED. Setup is straightforward and designed for convenience. It is plug and play on modern operating systems like Windows 11, 10, 8.1, 8, macOS, and Chrome OS, requiring no driver installation for most users. (Note: Drivers may be required for Windows XP/7/Vista and Linux). Measuring a compact 2.4 x 0.9 x 0.6 inches with a 3.9-inch cable length, the UGREEN 20254 is highly portable, making it an ideal companion for business professionals or students who need reliable connectivity on the go. UGREEN backs this product with a 1-Year Official Warranty against manufacturing defects.