D-Link DWL-520 Wireless PCI Adapter, 802.11b, 11Mbps Uses PCI interface Supports 11 Mbps, 5.5 Mbps, 2 Mbps, and 1 Mbps data rates with automatic fallback Up to 128-bit encryption Uses 2.4 GHz frequency and direct sequence spread spectrum technology Indoor range of up to 328 feet