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I think your suspicions are wrong. Those $12 rings will allow you to serve NDEF messages or similar. They won't do U2F, payment, car unlock etc.

• stavros 2y ago
  It doesn't look like the Z1 does payment either, though. I don't know how they do U2F, but it looks like it comes with a custom reader, which is non-standard. I don't know how Tesla unlock works, so I can't say there.
  • edent 2y ago
    There is no custom reader. It works with standard NFC readers on Linux and Android.
    • stavros 2y ago
      Ahh interesting, thank you.