... open frame LCD monitor,good performance,3M & ELO compatibility type:17''19''22'' LCD monitor 19'' open frame LCD monitor Technical parametersModelRXZG ... ( line/ field30~80KHz/60~75HzPower supplyExternal Power Supply:100 to 240V,50 to 60HzEnvironmentTemperature: ... 100mm 3) DIY installationOSD controlKeys-presses:AUTO,+,POWER,-,MENUfunctions:brightness,contrast ratio,auto adjustment,phase position ...