The USB2VGAE3 USB VGA Multi-Monitor External Video Adaptor lets you add a high-resolution (1920x1200) external VGA output to your desktop or laptop computer, using an available USB 2.0 port. A cost-effective solution for systems that lack the outputs required for a multi-monitor setup, this high-performance USB to VGA Adaptor can be used to mirror your primary display and show the same image on both screens, or extend your desktop to double your workspace. This small form factor USB video Adaptor can be used with up to 4 additional (5 total) USB2VGAE3 USB video adapters, creating multiple VGA connections to add displays quickly and easily - all without having to open the computer case to add extra video cards. Backed by a StarTech.com 2-year warranty and free lifetime technical support. Compact, USB-powered Adaptor provides the easiest way add secondary or multiple high-resolution displays to your PC. Completely external device offers a simple upgrade solution saving the cost and hassle of upgrading the internal video card on your system. The ability to use multiple adapters (up to five) provides a scalable display configuration for future expansion. Add a secondary display Adaptor and extend your desktop display without taking apart your computer to install a new video card. Add multiple (up to 5) monitors / projectors to your computer setup using one USB2VGAE3 device for each additional display. View large or multiple spreadsheets across multiple displays. A compact, lightweight solution for traveling business associates using laptop PCs enabling connection to a secondary display. Connect multiple monitors to a single computer to create engaging multimedia presentations. Use the Adaptor to connect your PC to your television for showing family pictures and movies. Increase productivity by running multiple applications on different screens, check your email on one display and work on a document in the other. Great for researchers and writers offering the ability to have reference material on one display and a working document copy on the other.