The 4-Port USB 2.0 Drive Bay Hub from SIIG installs in an available 3.5" or 5.25" drive bay to add four USB 2.0 ports to your desktop PC. The hub requires an internal USB Type A port and an available drive bay for installation. It includes mounting screws for simple installation. Adding an internal USB hub to your desktop is both practical and convenient. It reduces the desktop clutter associated with external hubs. It also adds the convenience of front-facing USB ports, allowing you to quickly connect devices without the need to fish behind your computer to connect cables.