Capable of projecting a 100 inch image with only 17m distance to the projection surface the acer k138st is an ultra portable short throw led projector with all the essential entertainment features enabling people to enjoy cinema on the go smaller than a sheet of a4 or letter sized paper and weighing just 075kg 17lbs the k138st has powerful built in dts sound audio so it can easily be carried anywhere without requiring additional speakers the acer lumisense enabled k138st is the world