This AddOn Accessories USB to VGA adapter offers external multi-monitor, high-resolution (up to 1920x1200) support for Windows computers through an available USB 2.0 port. It is a cost-saving solution for mirroring or extending your workspace onto a multi-monitor setup. This device can be used with up to 4 additional (5 total) USB video adapters, giving you a robust, multi-monitor solution, all without needing to open your computer or invest in additional video cards. The USB2VGA comes with a three year warranty and lifetime technical support.