Heart rate tracking  The heart of it all—heart rate powers important data like calorie burn, sleep stages, resting heart rate & more.  Active Zone Minutes  Tracks your time in heart rate zones so you get credit when you work harder.

In stock
  • Color
  • Black
  • Size
  • 1.56 In. W X 0.47 In. H X 1.6 In. D
  • Gtin
  • 00811138036690
  • Mpn
  • FB507BKBK
  • Condition
  • new