The Digital Card Reader features a high speed data transfer to and from SD cards through USB terminal on PC and Mac computers. It is drag and drop files manipulated with user friendly icons just like a removable hard drive and compatible with Window 98, 98SE, ME, XP, 2000, Mac OS 8.6, 9.x and 10x versions. Product features : Full Speed USB V1.1 pr V2.0 connectivity, Read and write flash memory card, Truly plug-and-play, hot swappable, Perfect for mobile user, A convenient and fast data exchange device for MP3, PDA, digital Camera, etc, USB interface, USB bus-powered, no external power supply is needed, Power LED indicator