Engenius EPI-3601S 600mW 108Mbps Long Range Wireless Network Adapter 802.11g PCI Card With Bonus 9dBi Antenna 600mW transmission power for superior range signal strength recieve sensitivity Powered by Atheros support 802.11b/g Windows XP Vista 32/64 bit driver support The most cost-effective 600mW solution includes a 15' inch +9dBi SMA Antenna that Boosts the Range as much as 4x