The JUH410 USB™ 3.0 VGA & 3-Port HUB is an external graphics card for your Mac® or PC. It allows you to add an additional display and 3 USB™ 3.0 ports. With this multi-adapter, there is no need to open your computer to add an expensive graphics card; you simply load the driver, plug in the adapter to the USB™ port, then plug the VGA monitor cable into the adapter and you are ready. It supports three viewing modes: primary, extended and mirror mode. With its plug-and-play functionality between your computer and second monitor or projector, you will be able to create a new visual environment in seconds.