The Sabrent USB 2.0 MS-Duo/MS-Pro Card Reader supports 20 different types of flash memory. It is compliant with both USB 2.0 and USB 1.1. It supports automatic page copy (source page read plus destination page write), hot swapping and plug and play, suspend and wake-up resume and 20 different types of flash memory card. It complies with the USB specification for bus-powered devices. The Sabrent USB 2.0 MS-Duo/MS-Pro Card Reader works at speeds up to 480Mbps. It has an LED indicator for power and access. No external power is required.