How can we detect whether people's physical health or not? I also know about physical discomfort, or what signal can be used to convey our physical state? It is a bit too conceptual. Still practical, the model is not bad.

What does this grade mean? Test alcohol concentration???

The train of thought is clear and strange.

This is also divided into models, after all, everyone's finger thickness is different.

It's pretty cool

It feels like wearing a ring.

Convenience