The Dual-Band Wireless-N USB Network Adapter for Windows from Linksys is a USB device that adds draft 802.11n, 802.11a, 802.11g, and 802.11b wireless networking to your computer. "N" wireless networking allows for transfer rates that are many times faster than that of 802.11a/g devices, making it an ideal solution for performance intensive networks where slower speeds are insufficient. This is a great way to add wireless networking capabilities to your computer.