The Tripp Lite USB 2.0 to VGA/DVI-I Adapter enables you to connect an additional monitor or projector to a computer/laptops USB 2.0 port. Two U244-001-R adapters can be used simultaneously, allowing the user to connect up to 2 additional monitors to a computer. Once the installation is done, the computer screen appears on the add-on monitor without the hassle of function keys to swap to a second monitor. When not using the extra monitor, simply unplug the adapter at any time. No reboot is needed.