*Fully support USB 2.0 High-speed transfer rate up to 480Mbps,downwards compatible with USB 1.1 *Fully support USB1.1 Full-speed transfer rate up to 12Mbps,upwards compatible with USB2.0 *LED indicator for data access. *Hot plug&play installation. *OS support:Windows98/ME/2000/XP,Mac9.x or above,Linux2.42 or above. *Bus-power for card reader,None extend power need. Remark(*):This description suit for USB1.1 cardreader. Remark(*):Card type supported and function refer to below pictures. Remark1:Support mini-SD card(with the card adapter)and Tflash card (woth the card adapter). Remark2:The parameter on the packing for USB 1.1 products is reference it only.