1) With import chips, the card reader supports hot-swapping, and be compatible with USB 2.0 and USB.1.1 fully 2) It Can read 4 types of memory cards ,CF, SD, MMC, XD card ,etc. 3) Power supply: DC+5 volts is supplied by USB port the safe current is 500mA 4) Dimension of the product: 65*65*15mm 5) Support Windows 98/ Me /2000 /XP /Mac OSX