The vs440hdmi 4x4 hdmi audiovideo matrix switchsplitter with audio and rs232 lets you share up to 4 distinct hdmi or dvi inputs using hdmi to dvi adapters not included with audio between 4 independent displays or projectorsr r providing convenient front push button and rs232 pc software control this matrix switch allows each input and the corresponding audio to be switched individually meaning that different av sources can be shown on each output or a single source can be output