This is an amazingly useful projector. It's older now, but hard to believe with all of the features including app enabled control. The build quality is really fantastic and the size is great. The big downside is that the battery isn't replaceable and it can't even run while plugged in if the battery is too low, as it can't charge up fast enough to maintain the power. It seems as though there's no bypass around the battery for plugged in use. Too bad they made something that will turn into ewaste