Hall Research VS-4 4 Channel VGA Video Switch
Hall Research VS-4A 4-Port VGA Switch with Audio and Serial Control
Hall Research VSM-A-4-4 4x4 VGA + Audio Matrix Switch
HRT VS-2A 2-Port VGA Switch with Audio & Serial Control
HRT VS-2A-PRG 2-Port VGA Switch EDID Programmer w/ Audio and Serial Control
