VDWALL LEDSync820H LED Video Switcher has been out of production, not available any more.  Please buy its alternative model: LVP300 HD Video Processor

5 true 4K2K_60Hz input ports,
Seamless and Fade in/out signal transition；
4 DVI output ports，driving capability up to 9.2 million pixels. Synchronized splicing of 3840X2160 LED screen；
each DVI output offers user defined resolution, maximum width or height 2160, 4 DVI outputs jointly realize 8640 pixels driving in width or height;
Widely applied in narrow pitch screen projects, such as exhibition、station advertisement、stage performance、restaurant hall、lecture room、school auditorium、church、market promotion etc；