this be a very good projector for display sharp image for game , movie or presentation on a fairly smooth white or light color wall or projector screen . its various input port make it a versatile projector for display device with hdmus , rca , VGA , or composite , and also have audio in & out . at approximately 4ft . you can display a video image about 4x7 ft. in size -lrb- approx . 81 in . tv screen -rrb- and at about 10ft . you have a mini imax theater . the projector can be adjust by use button on projector itself or through the remote ; have focus adjustment , adjustable projector foot and work great with my Sony 3d blu-ray player or 3d video card on my computer . with the include backpack , remote , 3d rf emitter -lrb- 3d glass sell separately -rrb- and cable , this projector be a great travel companion and work great in normal room light , too . feature that would have make this projector better would be , use a standard projector lense so you can use it as a home theater project , because move the projector further then 10 ft. make the image go out of focus and can not be adjust . also , the fan cooling cycle for the bulb be real short -lrb- about 9sec . -rrb- then shut off . high heat be still feel come from the exhaust vent in projector which could possibly damage lamp before its cool down enough to move . my other projector continue to circulation air into the bulb chamber continuously after its initial blast of air to cool down bulb . I use a small personal fan to blow air into this projector for about 15 min . to cool down the bulb enough so I can store it safety without worry about bulb damage . all these projector bulb be not cheap . the short throw optic lense be round which prevent lense cap from fitting snuggly on lense when store projector and no zoom adjustment . you adjust size by move projector closer or further from projector screen . overall this be a good projector for a person with small room want a movie \/ video game room in they home or apartment for family or friend entertaining and with the 3d build in to use 3d blu-ray player , game console or other 3d device directly , without buy a converter box ; it make this projector worth its value .