I have only had this projector for a few days. I've used it for two presentations so far. I waited until I found a Full HD native mode projector. The first presentation was on a solid whiteboard with a screen of about 10 feet. PDFs showing two standard pages of letters side-by-side and viewed from a distance of 15 feet could be read in the dimmed conference room lights when the device was running on batteries. Everyone was impressed. On batteries there are also no fans to be heard, but the picture is weaker. The second presentation took place in a large room, using the mobile phone's HDMI output to run the PowerPoint presentation again. I had to run on batteries and someone was holding the projector slightly over the table about 15 feet from the screen. There's no keystone correction, and it was noticeable but didn't affect the presentation's legibility. The lights in the hall were off, but 65 people could easily see the screen. I tested the color reproduction with some pictures I took when I bought a high quality DSLR. Color saturation was quite good. Out of curiosity, I also ran a short video while in the lab with a 10ft screen. The little speaker worked pretty well in a 14 x 36 foot lab where no other equipment was currently working. Synchronization between video and audio was good.
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