pro : they really pack a lot into a little package . come with a battery that really last , I have use it for over two hour and still have charge leave over . build in speaker be good enough if you be sit close to the projector . it have four different video input , headphone output , microsd slot , media player , it be quite a capable little toy . Enough light to be fine in a dark room . emit no mechanical sound -lrb- unless you put you ear to it -rrb- . respectable contrast ratio -lrb- 1000:1 -rrb- accord to TI 's website . it be a marked improvement from the 350:1 projector I have be use for my home theater for year . con : at the farthest distance , the optics be not good enough to keep the whole picture in perfect focus , you can choose either the left side or right side to be in focus , although if you be sit far enough back you do not really notice , it be only when you walk up to the screen and see the individual pixel that you notice one side be blurry . Wish there be color correction build into the software , mine emit too much red . that be not a problem if you video source have color correction , but if it do not -lrb- my apple tv -rrb- you be just gonna have to deal . convert media to play off the sd card be annoy before I get the setting right , there be nothing in the manual . it like mpeg-4 , with a mp4 file suffix -lrb- not m4v -rrb- a h264 video encoding , aac audio and a resolution 854 x 480 or lower . conclusion : if you want something to enjoy standard def movie or a presentation in a dark room this be for you . if you want something that can be see in daylight or hd , or bigger than 60 '' screen keep look .