I had hunted for ages trying to find a projector for my campervan that would work on a power supply like 12 volt cigarette lighter or 5 volt usb charger, and this one finally fits the bill.
Charging is easy and you can run movies on it whilst it is charging too.
My 5 volt 2 amp usb charger ports work fine with this device.
Whilst the projector is charging up using the mini usb port and lead provided, you can still run an hdmi lead to it from a portable dvd player, or stream movies to it via your iphone for services like Youtube.
The picture size will depend on how far away you set the projector from your screen, but the options are very good on how you stand or mount it. There is a tripod threaded screw port to connect this up to a tripod if you want, or you could mount it to the ceiling and set the picture to flip or reverse etc, depending on your setup.
You really do need a dark setting to get a bright picture though. Trying this in daylight or with curtains drawn in the daytime, will definitely be affected by ambient light coming into the van, so don't expect the 100 ANSI lumen LED buld to give you a brilliant picture in anything less than darkness.
The resolution is lowish at 854x480, but for a campervan setup where it is unlikely you will have the distance to get a picture above 50 inches, this is not a problem, because at that size it looks perfectly clear and bright.
If you are planning to go bigger, then expect a more pixellated effect and lower brightness. This thing is not a 240 volt 3000 ANSI lumen home projectore.
The projector is very compact in size. It really is like a can of soda pop, and the 360 degree built in 5 watt speaker is powerful enough to be heard clearly in a smallish setting. There isnt much dynamic range of course, or heavy bass response, but it certainly isn't a feeble tinny transistor radio sound.
i have tested this indoors using my wi-fi connection, and got Amazon Prime video working on it fine, as well as You tube videos. I also connected a portable dvd unit to it via HMDI and it worked fine.
Picture was tested from a distance of about a metre, giving about a 30 ins picture, to 3 metres giving about 100 ins picture, and in the dark room it looked fine at either size.
Amazing bit of kit, that can also double as a Bluetooth speaker as well.
I would recommend downloading the Nebula application to your iPhone to control the projector, as the remote can be a bit fiddly when trying to type in mouse mode for searching to movies etc. The phone app makes this a lot easier to achieve.

The image is bright and clear for my purposes and the sound is impressive. I've yet to try connecting to an external blutooth sound device and not sure I need to. The only reason I've not given a 5 star is I would have like to have horizontal auto keystone as well as vertical, but overall I'm very happy with the device.

Picture quality isn’t so bad considering it is a projector however the brightness on this model is quite low especially if you were to sit the projector further back from a screen. I’ve experienced constant lagging which is the reason I’ve had to return this. I had to buy a firestick because I thought it would help the audio/video lag but it was even worse. I guess you can’t ask for much from such a small projector but the price is crazy for it! and the battery life is not so great. Just having the projector on for 5 minutes made the percentage go from 100% to 95% and I’m not exaggerating. Unless you have a closeby socket to charge this then it’s fine, in my case i don’t and the wire is just slightly short. Buy if you’re willing to spend £300 on a slight laggy projector! But is a good piece of equipment for camping etc

best gadget I own.

Brilliant little Machine, small ,great picture and sound, charges quickly and on the go in the car. Has made our weekends in th motorhome so much better, it's like having a home cinema. As it's so small I can put it in my bag and carry it with me when we leave the van. Love it so much