Projectors usually make you think of massive boxes with humongous lenses, and a powerful, almost laser-like light emerging from them. That’s one end of the spectrum – on the other are tiny, almost toy-like models, called pico projectors like the MiNi Ray, the Aaxa M5 or the Sony MP-CD1. They swap performance (or display quality) for convenience and portability.
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https://www.techradar.com/reviews/alfawise-x1-mini-dlp-portable-projector