The U3DVVG-ADP USB 3.0 to DVI/VGA*/HDMI** Multi Display Adapter makes it possible to convert any existing USB 3.0 port on a Laptop/Desktop into a DVI/VGA*/HDMI** output, with resolution up to 2048x1152, This ALOGIC adapter makes it easy to add multi-Display capability, which can be used to mirror your primary desktop, showing the same image on each display, or to extend your desktop to double your workspace and increase your productivity. The Adapter is backward compatible with USB 2.0 ports as well **. *The adapters come included with a VGA converter (DVI to VGA converter), which allows conversion to a VGA output. For HDMI output, DVI to HDMI adapter (DVI-HDMI-MF) is to be purchased separately. **Although the adapter supports connection to a USB 2.0 port, the quality might be poor under high resolution display settings. This adapter does not support USB 1.0 /1.1.