The usb2dvie3 usb dvi video adapter offers a perfect external multi monitor solution enabling you to add a high resolution up to 1920x1200 external dvi output to your desktop or laptop computer system using an available usb 20 port a cost effective solution for systems that lack the outputs required for a multi monitor setup this high performance usb to dvi adapter can be used to mirror your primary display and show the same image on both screens or extend your desktop to double your work