HP Intel PRO/Wireless 3945 ABG Mini PCIe Wireless Card 802.11a/b/g 2.4 GHz 54 Mbps WM3945ABG MOW2 Networking Connection Note:This Wireless Card could only work on HP Version Laptop Frequency Band/Bandwidth : 2.4 GHz IEEE 802.11b/g ISM Band Host Interface : Mini PCI Express Transmission Speed Details:54 Mbps Maximum IEEE 802.11g ,11 Mbps Maximum IEEE 802.11b Operating Systems:Microsoft Windows 2000 Microsoft Windows XP Home Edition Microsoft Windows XP Professional Microsoft Windows XP Tablet PC Edition