1DISTRIBUTION: Video wall controller divides a complete HD multimedia interface HD image signal into 4 pieces and distributes them to 4 video display units (e.g. rear projection units, LCD TVs, etc.). 2COMPOSITION: TV wall controller can be completed with 4 HD multimedia interface HD video display units to form a large dynamic image screen. 3INPUT: 4 channel video wall controller supports 1 channel HD multimedia interface input, supports HD multimedia interface 0 input, supports 4K and 60HZ and below. 4OUTPUT: Video wall processor supports 4 way HD multimedia interface output, supports 1920x1080P and 60HZ. 5ROTATABLE: 2x2 video wall controller with RS232 control function, slit adjustment, support 180 degree screen rotation. 6EASY TO OPERATE: TV wall processor supports multiple splicing, easy to operate, plug and play.