The projector is very quiet, only a minimal Fiepsgeräusch the fan can be heard in complete silence. But in a movie, there is always noise. So no serious problem.
In addition, I give the sound through a Bose SoundLink Mini again. The operation has already been described by a Rezendenten and works perfectly.
I can connect my iPad power adapter to Lord of the Rings about 2 1/2 hours. Look easy by. The power supply must lt. Manufacturer with a 2A power supply occur. The iPad has such a power supply. Everything is just under 2 hours. Creates the projector even without power supply.
With these pieces electric toy makes you nothing wrong.
I would recommend this Pocket Projector always a friend.