HY851 Feature: 2 types of Flash Memory Card compatible: XD card, and USB Disk USB 2.0 port compatible with USB 1.0 & 1.1 interface Fast Transmitting Rate: 500Kb/s Max (FDD), 12Mb/s Max (memory card) Support WIN98/ME/2000/XP/Mac system (driveless above Win98) LED indicator: for power and access USB Powered directly: no extra Power required