Syncing & Notifications : Using Bluetooth LE wireless technology, Fitbit Charge 2 sends smartphone notifications and syncs automatically to computers and 200+ mobile devices. Certain features like smartphone notifications or Connected GPS may require Android 5.0+
Syncing range: Up to 30 feet
Syncing requires Bluetooth LE and Internet connection. Windows 10 computers that do not have Bluetooth LE will need a wireless sync dongle in order to sync.
Syncs with Mac OS X 10.6 and up, iPhone 4S and later, iPad 3 gen. and later, Android 4.3 and later, and Windows 10 devices
Get the power of continuous heart rate in Fitbit's slimmest design yet-all day, during workouts and beyond. Sizes - Small: 5.5-6.7 inches(140 mm-170 mm), Large:6.7-8.1 inches(170 mm-206 mm), X Large: 8.1-9.3 inches(206 mm-236 mm)
With heart rate, you can better measure calorie burn, and use zones (fat burn, cardio, and peak) to find the right workout intensity for your goals
With sleep stages powered by PurePulse heart rate, automatically track your time spent in light, deep and rem sleep and take steps toward a better night's rest. Syncs with Mac OS X 10.6 and up, iPhone 4S and later, iPad 3 gen. and later, Android 4.4 and later, and Windows 10 devices. Syncing range- Up to 6.1 m
See how working out more can improve your health by comparing your resting heart rate trends to your activity. Operating temperature: 14° to 113° F, Maximum operating altitude: 30,000 feet
Automatically track your steps, distance, calories burned and active minutes
The minimum and maximum circumference range between 140 - 170 millimeters
Personalized Heart Rate Training - Workout efficiently - view real-time heart rate, training zones and calories burned on your smartphone or tablet with compatible training apps. Official HR Monitor of Team Sky, defending champions of the Tour De France
Bluetooth 4.0 and ANT+ compatibility allows TICKR to connect to smartphones and tablets, as well as GPS watches by Garmin, Polar, and more. TICKR works with iPhone 4S and later, and with select Android devices using Android 4.3
Works with Wahoo RunFit + 50 Smartphone Apps including Nike+ Running, MapMyFitness, Runkeeper, Strava, Apple Health, Cyclemeter and more
Pair with Wahoo RunFit or Wahoo 7 Minute Workout and other compatible third party apps to personalize heart rate training zones and maximize your workout
Apple Watch Integration - Pair directly with the Apple Watch to track heart rate or sync heart rate data through the Wahoo 7 Minute Workout app or Wahoo RunFit app
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