VM0404 4x4 Video Matrix Switch connecting four VGA source devices to four VGA monitors, displays, or projectors at the same time. It’s steadfast unique features include: EDID mode selection for high compatibility, long signal range, easy source/display switching, matrix connections.As a Matrix Switch, each input can be independently connected to any or all outputs, and the audio and video inputs from each source device can also be switched independently, giving you the ultimate in flexibility and control in any multi-display audio/video installation.