... size:15 ,17 19 20,22, inch Grade A LCD monitor,three year guranteed.Brightness: 300cd/m2Contrast ratio: ... -spray, different colors for optionalBuilt-in power control panel and hi-fi speakersTwo cooling fans for computer board ... AC, 50Hz-60HzWorking temperature: -20 to 65 degree Celsius Relative humidity: 30 to 90%Storage temperature: -40 to 80 degree Celsius Relative humidity: 5 to 95%Packing method: ...