Acer X138WH offers you best projection performance in work or at home. For crystal clear display X138WH features with 3700 ANSI lumens and DynamicBlack 20000:1 high contrast ratio; also with Acer LumiSense content-aware process for showcasing vividly detailed text and images. At the same time the BlueLightShield could keep the distance from the negative effects of blue light exposure for you.