BUFFALO WLI2-USB2-G54 Wireless LAN Adapter:The AirStation 54 Mbps* Wireless USB Adapter offers instant wireless connectivity using AOSS™ (AirStation One-Touch Secure System) Technology to most Windows-based computer with an available USB port. Support for USB 2.0 provides the fastest USB data transfer speed; it is also compatible with USB 1.1 systems. The 54 Mbps* USB Adapter incorporates WPA (TKIP, AES) and standard WEP for security. Optional external 2.4GHz antenna can be added to boost range and increase performance.