ATEN 2x2 HDMI Matrix Switch VM0202H B&H Photo Video
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Ocean Matrix OMX-16HMHM0001 HDMI 2x2 Video Wall Processor
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Amazon.com: 2x2 HDMI Video Wall Controller, HDMI & DVI Support 4K Input TV Wall Controller,1080P Output TV Wall Processor, IR Remote & RS232 Control,180 Degree Rotate 1x2,1x3,1x4,2x2,2x1,3x1x4x1 Video Wall : Electronics