Alfa Network 1000mW High Power Wireless G 802.11g Wi-Fi USB Adapter with 5dBi Antenna AWUS036H 4" +2.5dBi Rubber Duck Antenna 802.11b/g, 500mW of power which is more powerful than any other Wi-Fi adapter on the market Very Secure with 64/128/256bit WEP Encryption, TKIP, WPA,WPA2, 802.11i Drivers included on CD for Windows 98SE, 2000, ME, WinCE 5.0, XP, 2003, Vista, Mac OS X 10.3/10.4 and GNU/Linux Laptops with PC express, Laptops with PC express, Laptops with USB, Desktops with USB, Packet Injection in Linux