Cisco-Linksys WPC54G-WB Wireless-G Notebook Adapter White Box Operates in the 2.4 Ghz frequency spectrum with speeds up to 54 Mbps Complies with IEEE 802.11g draft standards, and is backwards compatible with IEEE 802.11b products 32-bit CardBus Interface Up to 128-bit WEP encryption Compatible with Windows 98SE, Me, 2000, and XP