Buffalo 54 Mbps Wireless USB 2.0 Keychain Adapter. Connectivity technology: Wireless, Host interface: USB. Data transfer rate (max): 54 Mbit/s, Supported data transfer rates: 1, 2, 5.5, 6, 9, 11, 12, 18, 24, 36, 48, 54 Mbps. Frequency band: 2.412 - 2.462 GHz. Width: 25 mm, Depth: 11 mm, Height: 83 mm. Security algorithms supported: WPA, WEP