Harris Zandar Pro+ fusion 22 channel HDSDI multiviewer with dual DVI outputs and multi window display22x HDSDI / SDIauto detect video inputs with loop thru. (front and back boards are HD versions)Can be upagred to 26 inputs with 2x extra boards (not included)GPI ports2x DVIoutputs for multiviewer output with dual head capablelots of program and setup via front panel and more via ethernet with Z configurator software. Fully configurable layouts and presets etc and clocks etc to make any monitor wall layout need.dual power supply