Temperature damage and various color changes. You can attach it directly to the hot shoe or stand of the camera. It also has a magnetic back and comes with metal stickers you can stick anywhere for mounting on a variety of surfaces. I'd say there really aren't any downsides other than I would like the battery to last a bit longer. It would be great if you could see more than 1 color at a time. I can definitely recommend it and am considering buying a second one.
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