The projector itself is indeed small, measuring 4 x 4 3/4" and weighing a little over 3 ounces. Even though these measures aren't exactly "pocket-sized", it is still pretty small for a projector and is definitely mobile. Like I mentioned earlier, this projector is capable of producing images of up to 200" diagonally, though you really only want to utilize this feature if you are in a completely dark room and only if you are using an actual projector screen instead of a wall or flat surface.
For quick use in average conditions, a 50" image from the iPower Sight on a white wall is completely adequate. Actually, when you consider the size of the projector, you come to realize that the picture quality is pretty impressive as the projector uses a DLP chip covered in tiny mirrors that reflect LED light onto the screen.
This projector's lamp is capable of producing 85 lumens of brightness, which is better than almost every projector of this size, and is capable of producing images with a resolution of 845 by 480, qualifying it as a high-definition projector. Unlike most projectors that require a power outlet in order to function, the Sight is capable of running on battery power, though it only lasts for about two hours.
There are on-board speakers for sound output anywhere, anytime, though connecting to a speaker dock or another set of external speakers is a good idea if you want the best sound quality possible, especially if you will be using this projector frequently for video watching.
If you want something that is highly mobile and capable of producing a pretty good image from your smartphone, tablet or computer then iPower's Sight projector is a good find. At a price of $350, this isn't a bad deal if you are looking to take this projector on the road with you or if you want to put something in your child's bedroom in lieu of a television.
Source: The New York Times - A Big Picture From a Small Projector