Works in 2.4Ghz (2.412-2.484Ghz) ISM frequency band. 64/128-bit WEP, WPA, WPA2, WPA-PSK, WPA2-PSK, TKIP/AES encryption. Transmission distance : indoor up to 100 meters, outdoor up to 400 meters. (The longer distance, the lower rate.) Supports Windows 2000 / XP/ Vista / 7, Mac OS X & Liunx. Body size excluding USB connector: 16X23mm.Package content: 1X USB WiFi Wireless LAN Adapter. 1X CD driver.