Black Box 4 x 1 VGA Switch With Serial And AudioMeet the Black Box 4 x 1 VGA Switch With Serial And Audio, a compact, professional grade solution designed for classrooms, conference rooms, and retail environments where multiple sources must share a single display. This 4 input, 1 output switch lets you route crystal clear VGA video from up to four sources to one HD display or projector, while simultaneously delivering synchronized stereo audio. Engineered for dependable performance, it supports