Pocket Projector for iPhone 4 is perfect for on-the-go travel entertainment. Its super-bright 15-lumen LED projector lamp ensures clearer, more brilliant videos and iPhone slide shows than other pico projectors. 640 x 360 native display resolution projects up to 50" (diagonal) images. Focus adjustment lets you control image clarity while the integrated 0.5 W speaker delivers the audio. Great for keeping kids entertained with their favorite videos on the road!