Compact USB Card Reader Writer for SD MMC With this Compact USB SD MMC Card Reader/Writer, you can easily read and write to any digital camera or other portable device using SD ( Secure Digital ) or MMC removable cards! Support USB specification ver1.1/2.0. Hot-Swappable supported, plug and play. OS supported: windows 98SE, ME, 2000, XP, Mac 8.6 LED indication for both power on and operation. Low power consumption, suitable for desktop & notebook PC. Brand new, 1 year warranty!