The VP-28 is a high-performance multi-format presentation switcher for composite video, HDMI, DVI, DisplayPort, computer graphics video and stereo audio and micrphone signals. The unit operates as a a 3x1 composite video, 3x1 HDMI, 3x1 computer graphics video, 3x1 DVI-I, & 2x1 DisplayPort switcher, each with unbalanced stereo audio.