Product Description: CA*USB2.0 High-Speed compatible *Support SD/MMC, miniSD/RS-MMC with adapter *Dimension: 51mm x 52mm x 12mm *LED indication including Power/Read/Write *Card hot swapping without restarting the systems *PlugnPlay *Support Windows OS 98/ME/2000/XP, MAC OS 8.6/ 9.X/ 10.X