It's more like "let's buy a few and see what they do". kind of thing. There are different types of light, bright, dim, white and yellow. They work fine. I haven't kept them permanently attached to anything yet. If you're using them on a PC, they only glow in one direction. The bright ones that have a touch sensor turn them on/off. I think I can find a use for them somewhere. If they came out with different LED colors I would buy them. Can they be damaged on the keychain? You look strong enough.
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