Targus USB 3.0 SuperSpeed Dual Video Adapter (ACA039US) USB 3.0 connectivity lets you quickly and easily add one or two monitors to your laptop for additional viewing real-estate. Triple screen set up options include extending your desktop onto the additional monitors, mirroring your laptop screen or switching off the laptop screen to focus on your larger views. Standard USB 3.0 plug connects one DVI-I and one VGA monitor; Supports up to 2048 x 1152 resolution. Works only on Windows. Limited warranty does not cover products purchased from 3rd party sellers