... 6 digital led digital clock 100% feedback Led digital clock with computer RS232/485 communication 1 led digital clock iterm GC406 Case dimension:710mmX160mmX40mm2 Display 4 ... " and so on can customized. GC306 3"GC804 8" (200mm digital height) Optional digital height have 0.5",1",1.2",1.5 ... ",1.8",2.3",3",4",5",6",8",10",12 ...