We have introduced a useful iPhone 4 case with projector. But if you didn’t want to add too much bulk on your protective case, maybe the mini projector will be more suitable for you.
This is an ultra portable projector that measures 58 x 48 x 16mm, designed for iPhone, iPod touch and iPad. As we can see from the images, the mini projector features a compact design in order that you can easily take it into your pocket, while the mini projector with 320 x 240 pixels resolution and 4:3 aspect ratio, plus 1W stereo speaker system allows you to fully enjoy your favorite videos, movies and photos on the go. Apart from that, the accompanying AV cable also allows you to connect the mini projector with other devices, and the mini projector also comes with a tripod for optimal playback angle.
The mini projector is priced at $247.75 USD. If you’re interested, jump to GeekStuff4U for more details. Additionally, if you need other options, you might like to check the dock speaker with pico projector.