It's powered by the phone itself, so I guess for longer sessions we will need the phone plugged in for power. It can be used to project presentations from Powerpoint mobile, or training - or any video really, including movies you might have on your device. Any sound comes out of the speakerphone (or your Bluetooth speakers) - I will try and get some external speakers plugged in if possible.
It adds only 50g to the phone and has a manual focus. You slide the lens cover to turn the projector on, and use the camera button to switch between landscape and portrait.
Here are some first pictures of the phone with the pico projector attachment and some projections at daytime - I will try and get a picture of a night time performance later:
Both the AT&T LG eXpo Windows Phone and the pico projector were supplied by AT&T for my review.
Other related posts:
Windows Phone and Android apps screen comparison
Windows Phone 8 Portico update: at last here in New Zealand
Windows Phone updates, again
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