From Linksys, A Division of Cisco Systems:
Linksys Wireless-G USB Network Adapter. Connect your USB-equipped desktop or notebook computer to a wireless network at incredible speeds, incorporating two new, blazing fast technologies USB 2.0 and Wireless-G (802.11g), the Adapter delivers data rates up to 54Mbps (5 times as fast as 802.11b), without the trouble of opening up the case of your desktop computer. High-gain antenna lets you put your computer almost anywhere in the building, without the cost and hassle of running cables. Now you don't have to drill holes in your walls and climb through the attic or cellar to get connected to the network. Once you're connected, you can keep in touch with your e-mail, access the Internet, use instant messaging to chat with friends, and share files and other resources such as printers and hard disk storage space with other computers on the network.
Connects your desktop or notebook to a wireless network at up to 54Mbps when used with a USB 2.0 port.
Easy, no-tools setup on any desktop or notebook computer with USB support.
Also compatible with Wireless-B networks (at 11Mbps).
Wireless communications are protected WPA encryption.