not good for ANYTHING BUSINESS RELATED : + this be not good for anything business related . in a business setting , meeting , seminar , etc. . this do not have the power to project in a light room . no one will be able to see the screen . + you audience will also not be able hear the sound . + this be not good for a booth at a conference\/seminar either . again the lighting will make it nearly impossible to see and the picture quality be not crisp and typically wash out . you be much better off get a lcd\/led tv and set it up in you booth . this will not work . + if you be at you desk at work , run it off you computer . + if you be in a conference room , run it off a laptop or proper projector . PRACTICAL use for the projector -lrb- only good if the setting be PITCH DARK -rrb- : + if you be in a public space w\/o electricity in the evening and it be quiet as a mouse outside , you could probably use this item . + I can not think of any advantage of use this projector as oppose to hook up you phone to a monitor or a real project . before purchase this product , I read the review of the other mini-projector list on Amazon . at the time of this review , there be not a single one with a 4 or 5 star avg . they all have either 3 or 3.5 star , and a price range from $ 100-350 . for the most part the the review for all of they read the same , so I opt with the cheapest model know it be a early 1st generation technology that would be quickly improve upon in the next year or so . I buy it with low expectation , and my expectation be more than meet , as a result i return it . in short the critical review of this projector be accurate . 1 . brightness : w\/10 lumen you can not expect much . -lrb- a typical average projector sport 3000 + lumen - so that give you a idea of what you be deal with -rrb- . in a darkened room , the picture borderline acceptable . imagine if you have a old tube tv and the picture be start to fade out . that be the output . the `` always in focus '' lens be a little bit of a stretch . even after i increase the brightness level to the max , nearly impossible to see . 2 . cord : it include all chord necessary to run the projector from you phone -lrb- minus a apple chord if you be use a apple product -rrb- 3 . sound : you can not expect miracle from a piece of technology this size . it be exactly what you would expect , like a tinny transistor radio with very low volume . 4 . SDHC card slot : it provide a standard size Camera Card slot . play a slide show of pic , you set the transition , etc from the projector . I drop a video clip on my card , and the projector be not able to read it . I be not sure if that have to do with the video format\/or the operating software . 5 . functionality : Easy to use overall .