This USB to VGA Display adapter with external video / graphics card lets you add a high-resolution (1440x900) external VGA output to your desktop or laptop Windows-based computer using an available USB 2.0 port. Increase Your Productivity by Connecting an Additional Display Adding a dual or multi monitor setup to your computer can vastly increase your productivity by giving the freedom to access more applications at the same time. This video adapter is intended to support all of your business applications including web browsing, email, spreadsheets, and presentations. You can also leave your system video card available for more demanding applications such as gaming or CAD design, while you use the USB monitor for reference material. Scalable for Your Needs This small form factor USB video adapter can be used with up to four additional (five total) USB2VGAE2 USB video adapters, creating multiple VGA connections to add displays quickly and easily - all without having to open the computer case to add extra video cards. Affordable and Convenient A cost-effective solution for systems that lack the outputs required for a multi monitor setup, this high-performance USB to VGA adapter can be used as a screen mirroring adapter to show your primary display on both screens, or can be used to extend your desktop to double your workspace. This USB to VGA video display adapter is backed by a StarTech.com 3-year warranty and free lifetime technical support.