USB 3.1 Speed means less waiting! Transfer your HD video, images and other digital content between your memory card and PC/Mac without the delays associated with slower USB 2.0 technolog. Save your camera and smartphone batteries, Backup photos and video footage onto your computer hard drive. 2 memory card slots - no card adapters required. If you already use high-speed memory cards such as microSDXC/SDXC UHS-I U1 and U3, then the Integral USB Card Reader will maximise their high-speed potential.