1.USB 2.0 all in 1 memory Cardreader/writer, 2.5 card slots,read and write MS / MS-PRO / MS-DUO / MS-PRO-DUO / MS-MG / MS-PRO-MG / MS-ROM / M2/SD / MMC / MMCII / Mini-SD / RS-MMC / SDHC/T-Flash /Micro SD/XD Cards,etc. 3.Support reading and writing the cards directly,fastly 4.It is easily carried.Its transferation speed is up to 480 Mbps 5.Powered by USB interface 6.Plug and play 7.Working Indicator:LED 8.System:Windows 98SE/ME/2000/XP/VISTA,Linux2.4.X MacOS10.0