Connect mode
Mode A: 2 display units,1 computer. The image will only display on one of the screens. You can switch them back and forth from 2 display units by pressing the button.
Mode B: 1 display unit, 2 computers. The image will only display from computer 1 or 2. You can switch them back and forth from 2 computers by pressing the button.
VGA output 1 supports all kinds of display units, Such as TV, LCD screen, Projector, VGA input 1&2 supports PC, Laptop.