SIIG’s USB to DVI/VGA Multi Monitor Video Adapter is designed to quickly and easily add another DVI-I or VGA port to your computer’s USB 2.0 port. This USB to DVI/VGA adapter supports resolutions up to 1920 x 1200 @ 32-bit color, 60Hz and 75Hz monitor refresh frequencies, and multiple display modes including primary, extended and mirror. It comes with a DVI to VGA adapter to allow for VGA-enabled display connection. The USB to DVI/VGA Multi Monitor Video Adapter is powered by the USB bus - no external power adapter is required. It is an ideal solution to connect an additional DVI-I or VGA display and use it for an extended desktop or as an alternative display for your main screen.