The USB2DVIPRO2 USB to DVI adapter functions as an external graphics card for Windows and Mac computers. Perfect solution for turning desktop or laptop computer into a dual-display or multi-monitor environment, all through the simplicity and convenience of USB. The USB-DVI adapter delivers high quality video (up to 1920x1200p) for a variety of applications and is capable of simultaneously running up to five additional displays from a single computer (using four USB2DVIPRO2 external video adapters). The adapter connects to a host computer through a USB 2.0 port, acting as an external DVI 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 pixels, this USB-DVI video adapter is the ideal solution for a wide range of operating environments as well as large-screen displays/monitors.