USB4 For More: The newest USB4 technology allows for transfers at up to 40Gbps, or up to a blazing 3,500MB/s for your memory cards. This reader is designed to be backward compatible, plug & play, and bus-powered with OTG support for your ease. Versatile: The USB Type-C cable is detachable for extra flexibility when selecting cables and adapters to suit the host. This card reader's compact design makes it ideal for attaching to a camera or cage for convenient external recording, too. Your Card Reader: Simple, fast, reliable. The Sabrent USB4 CFexpress Type B Card Reader (CR-U4XB) stands out with its simple but resilient design. Read and write your CFexpress Type B memory cards at up to USB4 speeds, in the field or otherwise.