Touch Screen Monitor with Com or USB Connection Port Product ... choose 20.1-inch LCD panel, Resolution(pixel) WSXGA: 1680 x 1050, Aspect Ratio: 16:10, Brightness: 300cd/m2 ,Contrast Ratio ... : 8001, Visual Area: 433.4 x 270.9, Pixel Pitch: 0.258mm, View Angle: ... 50-60hz,60w Software running environment: WINDOWS95/98/2000/X Operating System Working environment: temperature +0-+40, ...