Product code: Fitbit charge 4 sold
The Charge 4 tracks your steps, distance, floors climbed, calories sold burned, and Active Zone Minutes, a new metric earned for time spent in fat burn, cardio, or peak heart rate zone. Women can use the Fitbit app to track their periods and fertile windows, and view where they are in their cycle from their wrist.
The Charge 4 tracks your steps, distance, floors climbed, calories sold burned, and Active Zone Minutes, a new metric earned for time spent in fat burn, cardio, or peak heart rate zone. Women can use the Fitbit app to track their periods and fertile windows, and view where they are in their cycle from their wrist.