Sabrent NT-WGHU 1000mW 1W 802.11b/g High Gain USB Wireless Long-Rang WiFi network Adapter with 5dBi Antenna for Wardriving and Range Extension (Realtek 8187L CHIPSET)
The Sabrent NT-WGHU is  the latest version of the most powerful card available. This has a  stunning 1000mW output power. So if you are looking for a device to  connect to an outdoor 2.4 GHz antenna, such as on a boat or an RV, this  is a perfect solution. It outperforms wireless cards that are built in  to newer laptops. Adding this to your laptop or desktop computer will  enhance range and signal quality at longer distances. And works with  Win98SE/200/ME/XP, Windows Vista, Windows 7, Linux (kernel 2.6.6 and  later) and Macintosh (OS version 10.4). And the necessary drivers for  ALL of these operating systems are included on CD-ROM* Connects at a full 54Mbps via USB 2.0, up to 8 times faster than a USB 1.1 adapter* High gain upgradeable* Compact size for greater flexibility* Also compatible with USB 1.1 desktop and notebook computers* Plug-and-Play Compatible with windows 98SE, 2000, Millennium, XP and Linux* High security 64/128/256bit WEP Encryption, TKIP, WPA, 802.11Data Rate 802.11b: UP to 11Mbps, 802.11g: 54MbpsAntenna Type 1 x 2.4Ghz SMA connectorChipset Realtek 8187LOutput Power 24dBm (OFDM), 30dBm(CCK)Frequency Stability within +25 ppmData Modulation Type BPSK,QPSK, CCK and OFDMSecurity WEP 64/128, 802.1X support, Wi-Fi Protected Access (WPA), WPA-PSK ,WPA II.