The 4K 2X2 video wall controller supports 1 way HDMI/USB-C input and 4 HDMI outputs. Its main function is to split a single HDMI or Type- C USB HD image signal into 4 segments and distribute them to 4 video display units (e. g., rear - projection units, LCD TVs). Paired with 4 HDMI high definition video display units, it creates a large dynamic image screen.