Add a video card to your PC or Mac desktop or laptop computer. The IOGEAR USB 3.0 External DVI Video Card instantly adds an additional high resolution DVI display through your USB 3.0 port. Simply install the driver, plug the adapter into the USB 3.0 port and you're ready to go. Extends your desktop across an additional display, allowing you to increase your productivity like never before. While reading email on one display, open attachments on the other display, or expand spreadsheets across both monitors. In graphics programs you can increase your work area by putting all your pallets on the second display. Additionally, no power supply is needed as the USB 3.0 to DVI External Video Card is powered through the USB cable.