CHF34.90
Colmi Smartring
11, Black
Question about Colmi Smartring
Can it really measure blood pressure? How do I choose the right size? Is the diameter inside? Or measured on the outside?
Blood pressure? I wouldn't have seen it anywhere in the app.
It doesn't even measure my blood oxygen correctly :-(
I measured the finger size as indicated and ordered one size larger - still too small
-> no purchase recommendation from me