Canon Projector Rayo R4 is a mini projector, designed to fit in your pocket. The projector has a long-lasting battery and it's easy to use.
Con Low quality picture
The 640 x 480 resolution produces a low-quality picture. Pretty much the only review for this projector is the original document from Canon, so there is no objective information available about the picture quality. They did state a contrast ratio of 800:1, which falls far behind the best portable options.