Enables 2 computer to share 1 monitor, projector or allows 2 monitors, projectors to share 1 computer not simultaneously. Not support DDC, DDC2,DDC2B. Support VGA, XVGA, SVGA, UXGA and Multisync display. Plug and play, no additional software needed. No power supply required, 3 standard VGA female ports, 2 in 1 out.