The Lexar Professional Workflow XR2 Card Reader for 2nd Generation XQD Cards is a USB 3.0 reader designed for use within the Lexar Professional Workflow HR1 and HR2 Hubs. The compact form fits within one of the four bays of the hub to enable its use along with up to three additional Professional Workflow Card Readers. Alternatively, this reader can be used independently of the hub as a standalone reader along with the included USB cable.