With its superior design & construction, this four-port hub is ideal for a wide range of USB devices, including flash drives, external hard drives, external DVD players, MP3 players, digital cameras & other high-end applications. It is simple to use, with no special software, complicated set-up procedures or external power requiredjust plug it in & you're ready to play. Allows you to add or remove a device at any time with no need to power down the computer. Backwards compatible with USB 2.0. Number of Ports: 4; Transfer Rate: 5 Gbps; Width: 6.3"; Depth: 3.2".