Introduction:
 This 2×2 video wall controller, support HDMI or DVI input and 4 HDMI output, the main function is to divide a
 complete HDMI, DVI HD image signal into 4 blocks and assign to 4 video display units (such as rear projection
 unit, LCD TV, etc.). Complete with 4 HDMI HD video display units to form a large dynamic image wall.
  Features:
 * Support HDMI and DVI input;
 * Support 4 HDMI output;
 * Output support RGB 4:4:4;
 * 1080p60 to 1080p60 version : Support input/output up to 1080P 60Hz;
 * 4k30 to 1080p 60 version : Support input up to 4K 30Hz,output up to 1080P 60Hz;
 * 4k30 to 4k30 version : support input/output up to 4K 30Hz
 * Support RS232 control;
 * Support 2X2/1X2/2X1 splicing, easy operation, plug and play;
 * Support 2X2 automatic splicing function;