Thethird-generation optical heart sensor andelectrical heart sensor work together to provide advanced heart rate monitoring. Thesapphire front crystal enhances durability for thestainless steel case.
I bought this primarily for the fitness monitoring capabilities but have used it for so many others things including opening my smart door lock to monitoring my home CCTV . I only wish I’d have bought one sooner, I’ve opted for the stainless steel version it looks and feels quality. Bought a few extra straps to change the look depending on what in doing. Oh and it tells the time!!