With its superior design and 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 and other high-end applications. It is simple to use, with no special software, complicated set-up procedures or external power requiredâ€"just plug it in and you"re ready to play. Hot-swappable functionality 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.