Features Bright, Clear Images Acer X138WH with 3, 700 lumens high brightness provides the ability to project crystal clear, vibrant images from a long distance on a large screen even in daytime indoors. The Power of Sound Acer X138WH Built in 3W speaker provides powerful sound, eliminating the need for external speakers. The audio ensures movies come to life, songs have more depth, & games are more engaging. Expressive Levels of Contrast The contrast ratio is up to a whopping 20, 000:1. Dynamic Black improves image contrast by analysing onscreen content frame-by-frame & then dynamically adjusting Acer X138WH lamp power to optimise black levels. Great colours & protect your eyes Acer X138WH Bluelight Shield allows users to lower levels of blue light to lessen the negative effects of blue light exposure. Low blue light scene can automatically turn down the filter to prevent colour shift while high blue light scene can automatically activate the filter for eye protection. More Real As Never Experienced Pair with 3D glasses & AV device that supports 120 Hz output, & have a 3D cinema like experience never before with the Acer X138WH! Acer Colour Boost 3D Acer Colour Boost 3D has the ability to reduce brightness decay & colour shift for both 3D & 2D-3D contents through enhancing colour brightness. At the same time, it compensates colour saturation & colour temperature. Smart Content-aware Process Lumi Sense incorporates a clever content-aware process. It analyses projected content frame by frame & dynamically adjusts image visibility to optimum levels. Thanks to Lumi Sense intelligent judgment & dynamic adjustment, all dark scenes are clearly displayed with no loss of detail. 3D Fun Can Be So Easy With One Button 3D function, user you simply press the 3D button to toggle among various 3D functions, including 3D On/ Off & 3D L/R Invert Friend to the Environment Acer X138WH With ECO mode, the lamp life will be extended to up to 10, 000 hours & the power consumption can be reduced up to 70%.