The Lexar Professional SR1 Card Reader is a USB 3.0 reader designed for use within the Lexar Professional Workflow HR1 Hub. This compact form fits within one of the four bays of the hub. The reader can be used independently as a stand alone reader along with the included USB cable. Designed for use with SDHC/SDXC UHS-I memory cards, it is capable of 3.0 interface or high-speed transfer speeds up to 5 Gbit/s. Compatible with Mac OS X 10.6 or later and Windows 7/8 operating systems.