I remember when I first got my Flipper Zero I read into this a bit, but realized I had never actually seen one in the wild, thought it was something ancient (Not that I'm using my flipper in the wild).
Is it really just not a US thing? Are these used in other parts of the world?
Edit: I think I'm actually asking about iButtons/Dallas Keys, now that I'm re-investigating, but any input is welcome!
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