At one end of the wire is a 3.5 mm Jack plug. On the other end of the wire is presumably a glass LED.

When connected to the phone, nothing happens. The LED does not start to glow.

Also, this wire doesn't work as a microphone. It's also not an earpiece.

What is it for?

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[–] 2 points 2 years ago

No, but you can get something like this to do what you are asking

https://a.co/d/e6DROYc

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