Acer X138WHP offers you best projection performance in work or at home. For crystal clear display, X138WHP features with 4, 000 ANSI lumens & Dynamic Black 20000:1 high contrast ratio; also with Acer Lumi Sense content-aware process for showcasing vividly detailed text & images. At the same time, the Bluelight Shield could keep the distance from the negative effects of blue light exposure for you. Acer X138WHP DLP projector UHP portable 3D 4000 lumens WXGA (1280 x 800) 16:10 720p