... , MS, MSPRO, MSDUO, PDUO, SM, MMC and RSMMC. Description:USB 2.0 card reader read XD, MD, CF, Min SD, SD, MS, MSPRO, MSDUO ... MHz PLL.* Built-in 3.3V to 2.5V regulator . Specifications:* Power Supply: Bus-powered* Interface: USB 2.0 (480Mbps)* System Environment:* Operation ... , & XP, and Mac OS 8.6, 9.X,* Packing: RW251 card reader, manual USB 2.0 Card Reader (GF-CR-RW251)