This pure USB projector is not available as a separate graphics card, but it only copies the contents of the main screen to the projector over, "extend desktop" feature so that does not work for example. It must be installed a little try-program that constantly moves along and that you connect the projector recognizes the main screen goes blank (and in the resolution changes) and only the projector turned on. That's not nice solved and can be used under Linux it is therefore not mW.
Leo.