The USB2VGAPRO2 USB to VGA Adapter functions as an external graphics card for Windows and Mac computers - the perfect solution for turning your desktop or laptop computer into a dual or multi-monitor environment, all through the simplicity and convenience of USB. The USB-VGA Adapter delivers high quality video (up to 1920x1200) for a variety of applications and is capable of simultaneously running up to five additional displays from a single computer (using four USB2VGAPRO2 External Video Adapters). The adapter connects to a host computer through a USB 2.0 port, acting as an external VGA video card to either extend or mirror the desktop shown on the existing display - without having to open the computer case. Featuring driver support for Microsoft Windows (including Aero themes) and Mac OS X, and with video support for resolutions up to 1920x1200, this USB-VGA video adapter is the ideal solution for a wide range of operating environments as well as large-screen displays/monitors. The USB2VGAPRO2 USB to VGA Adapter is backed by a StarTech.com 2-year warranty and free lifetime technical support. The graphics adapter supports high-performance requirements and high resolution video, making it suitable for connecting large-screen monitors. USB-powered operation eliminates the need for an external power adapter, enabling you to position an additional monitor without having to make the extra power connection or carry an additional cable for mobile applications. Completely external device offers a simple upgrade solution saving the cost and hassle of upgrading the internal video card on your system, which in many cases would void manufacturers' warranties. Add multiple (up to five) monitors / projectors to your computer setup using one USB2DVIPRO2 device for each additional display. View large or multiple spreadsheets across multiple displays. Increase productivity by running multiple applications on different DVI screens.