1.ansfer rate of Hi-Speed USB 2.0 interface can be up to 480 Mb/sec (Max) 2.Internal design fitting into 3.5" drive bay to save the desktop space. 3.Supports Hot-Swapping and Plug and Play function. 4.Sockets:Memory cards socket x 4, USB socket x 1 5.USB Bus powered; no external power required. 6.Supports Mass Storage Class Drive 7.Support Win 98/2000/XP, Mac OS V9.2 or higher 8.No driver installation required for Windows ME and Windows XP 9.Size:144*101.7*25.4mm