The Wireless G PCI Desktop Adapter from D-Link is a PCI expansion card that adds 802.11g and 802.11b wireless networking to your computer. 802.11g allows you to connect wirelessly at speeds of up to 54 Mbps, giving you ample bandwidth to stream audio or video, play computer games, or simply browse the web on a wireless connection. This is a great way to add wireless networking capabilities to your computer.