The bracelet looks very beautiful. And as far as I understand it even has protection against water. You can practice in the pool. I'm just looking for a good fitness bracelet.
For swimming pool you need ip *8. Because ip *7 it's short-term immersion up to 1m depth. It's for showerz bath or fast trainings in little pool

But still the design and protection is very cool. For most people this is enough.
You know your stuff! We are already planning our next device. This will be considered.