Compatible With Universal Serial Bus Specification ver2.0 And Also Backward Compatible With USB1.1 USB 2.0 transfer rate up to 480Mbps ,backward USB 1.1 transfer up to 12Mbps Data copying between cards without storage intermediate,and it also allows you to upload photos/data from compatible media cards to a computerí»s hard driver Four media slot can be used at the same for data exchanges. Low power consumption. Support Firewire (IEEE 1394) With Sata and Sata power Port Support the HD Audio input/output It is compatible with WinME,Windows 2000 and Windows XP, Win Vista operating system,it is also compatible with Mac OS 9.2 or higher operating system