Only have one VGA output on your video card? No problem! This handy device will allow you to extend your PC desktop to a second or third monitor via a USB 2.0 port. Simply install the included software onto your Windows computer, plug the compact adapter into an open USB port, and plug a VGA monitor into the adapter. If you already have a dual monitor video card, this devices lets you add a third monitor to your desktop. Supports 1280x1024 @ 8/16 bit color, and up to 1280x768 @ 8/16/32 bit color. Supports Primary, Extended, and Mirror in dual monitor settings.