... Color LCD Monitor SpecificationsRefractometryVertex Distance (VD)0.0,10.0,12.0,13.5,15.0mmSphere Power (SPH ... 0.25D)Cylinder Power (CYL)0.00 ~ +10.00 D(Increments selectable between 0.12Dand 0.25D) ... LCD monitorEnvironmental requirements:OperationTemperature: + 10 to + 40°CHumidity: 30 to 85% RHStorage and TransportationTemperature: - 10 to + 55°CHumidity: 10 to 95% RHPower supplyAC220V, 50HzSize280( ...