Sleep Stages & Score: Charge 4 tracks your time in light, deep and REM sleep stages and gives you a nightly Sleep Score in the Fitbit app, so you can better understand your sleep quality and work toward better rest. Notifications & Apps: Stay connected with call, calendar and smartphone app alerts, text notifications and convenient apps like weather and timer. Plus, send quick replies to messages (Android only).24/7 Heart Rate: Use 24/7 heart rate to better track calorie burn, optimise workouts and uncover personalised health trends that inspire you to make moves on your health and fitness goals. This item is in the category "Sporting Goods\Fitness, Running & Yoga\Fitness Tech\Activity Trackers". The seller is "sganton3" and is located in this country: GB.
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