The Alfa AWUS036H 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.