Compatible with Brother DS-640 Compact Mobile Document Scanner This cable connects your HDD device to USB ready computer or USB hub for data transferring. USB 3.0 certified cable: 1> Higher transfer rates up to 5 Gbps 2> Full-duplex data transmission support for new transfer types in the future 3> Increased device current draw to better provide power for High power demand devices 4> More Power efficiency 5> Fully backward compatible with USB 2.0 devices and computers Package include: 1 unit of USB 3.0 Data Cable