Overview: Support USB (Universal Serial Bus) 2.0 Plug & play hot swapping, easy to install & use. High speed data transmission, up to 480M bits per second. Powered by USB (Universal Serial Bus) connection cable, no external power required. For standard USB (Universal Serial Bus) connector by desktop, laptop. System Requirements Microsoft Windows 98/98SEMicrosoft Windows 2000.P4 Microsoft Windows MEMicrosoft Windows Xp. Sp 3 Microsoft Vista Specification:1.97in*1.97in*0.87in 1.21oz