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 up to 1280x768 at 16/32 bit color @ 60Hz. Supports Primary, Extended, and Mirror in dual monitor settings.System Requirements:-Available USB port- Windows 2000 / XP / Vista -Single attachment: CPU: Intel/AMD Single Core 1.5 GHz processor or higher, RAM: 512 MB memory or higher.-2-3 Attachment: CPU: Intel/AMD Single Core 2.4 GHz processor or higher, RAM: 1GB MB memory or higher.4-6 Attachment: CPU: Intel/AMD Dual Core 2.0 GHz processor or higher, RAM: 2GB memory or higher.*Actual look of product may vary.