Fitbit Charge 4 Fitness and Activity Tracker with Built-in GPS, Heart Rate, Sleep & Swim Tracking, One Size (S & L Bands Included) (Black) is bands that have included several number of features:-
This Certified Refurbished product is tested to work and look like new with minimal to no signs of wear & tear; the product comes with relevant accessories and is backed by a minimum six month supplier backed warranty; box may be generic
Use 24/7 heart rate to track resting heart rate & better measure calorie burn
Active Zone Minutes alert you when you're in your personalised Fat Burn, Cardio or Peak heart rate zones
After outdoor workouts, see a workout intensity map in the app that shows your heart rate changes along your route
Use built-in GPS to see your pace and distance on screen during outdoor runs, cycles, hikes and more
