HD 4K HDMI DV Video Wall Controller Processor 2x2 3x3 1x4 1x3 HDMI Input/Output
(Multiple display modes: Supports 1x1, 1x2, 1x3, 1x4, 2x1, 2x2, 2x3, 2x4, 3x1, 3x2, 3x3, 4x1, 4x2 modes for you to choose from. 1) 4K only refers to HDMI input signals. It supports up to 4K 30Hz input and 1080P 60Hz output.