COMBO all-in-1 card reader hub, 1).USB2.0 protocol compliant, downward compatibile with USB1.1, 2).USB bus powered, no external power required, 3).support flash card category: CF1/CF2/Microdrive; SD/MMC/RS-MMC, MS/MS-PRO/MS-DUO; XD/SM. Need adapter to support T-FLASH, MINI-SD, MICRO-SD, MMC-MICRO. 4). compatible with WIN98, 2000,ME, XP, MAC9.X or above. 5). USB mass storage compliant, need no drive for Windows XP, ME, 2000, and MAC10. X or above. 6). with USB A plug short cable on products, no extension cable required. 7). LED indicator to show power and data access. 8).dimension: 103.2*55*13.2mmBE 3 PORTS HUB FOR MORE USB DEVICE APPLICATION: 1). USB2.0 protocal compliant, with 480MB/s data rate; 2). 3 more USB hub port combined, to allow more USB device application. 3). USB port indicator to show the connectivity of the hub port.