How Fitbit heart rate data saved this woman's life
2017 Water Proof FitBit (Heart Rate Monitor)
Language: Spanish,Polish,Portuguese,French,Turkish,English,Italian,Russian,Norwegian,German Function: Passometer,Message Reminder,Sleep Tracker,Remote Control
Charge HR Fitbit Heart Rate + Activity Wristband worn twice comes with charger and original box with instructions Fitbit Other
Fitbit's heart rate monitoring wristbands are wildly inaccurate, according to researchers.