Make Every Beat Count.
Cardio Fitness Level
Get a better understanding of your overall fitness with Fitbit Charge 2TM. Using your heart rate and exercise stats, Charge 2 will give you a Cardio Fitness Score in the app, show you how it compares to people of your same age and gender, and help you learn how to improve your fitness over time.
Guided Breathing Exercises
Fitbit Charge 2TM helps you find moments of calm throughout your day with guided breathing sessions that play on the display. By tracking your real-time heart rate with PurePulseTM technology, these 2-minute or 5-minute sessions give you personalized prompts that help guide you through a relaxing breathing session.
Fitbit Charge 2TM enables you to stay connected to your life by receiving notifications of calls, texts, and calendar alerts right on your wrist. The Fitbit Charge 2TM will vibrate for incoming notifications, show caller ID, phone numbers, and will display event details in the occurrence of a calendar notification.
PurePulse Heart Rate
You can measure your heart rate without the need for an uncomfortable chest strap with the Charge 2’s PurePulseTM system. Track all day calorie burn, maximize your training time, ensure your workout intensity remains high, and analyse where you are making health improvements to further tailor your exercise experience.
Auto Exercise Recognition
SmartTrackTM automatically recognises select exercises (running, biking and more) and records them for you in the Fitbit app. You can also customise what gets recorded to give you an experience more representative of your own fitness goals, and the multi-sport tracking features means you can view the stats on your wrist in real time.
- PurePulse® Heart Rate
- Cardio Fitness Level
- Guided Breathing Sessions
- Multi-Sport Tracking &
- Reminders to Move
- All-Day Activity
- Auto Sleep Tracking
- Auto Exercise Recognition
- Call, Text &
- Long Battery Life
- Up to 5 days*
PurePulse Heart Rate
A better you starts with heart.
Track heart rate continuously on your wrist to maximize workouts, better track calorie burn and get a clearer picture of your health—all without an uncomfortable chest strap.
Cardio Fitness Level
Get a better understanding of your fitness level and see how you can improve over time with a personalized Cardio Fitness Score.
Guided Breathing Sessions
Find moments of calm throughout your day with personalized breathing sessions based on your real-time heart rate.
Track specific exercises like running, weights or yoga to see your workout stats on display.
Work toward your weight goals.
Better Calorie Burn Tracking
Losing, gaining or maintaining weight is about math: calories in vs. out. By measuring how hard your heart is working—both all day and during workouts—you get a better measure of total calories burned.
So, even if your favorite heart-pumping activities don’t affect your step count, you’ll still get the right credit for your effort.
Optimize your time spent on exercise
Tracking heart rate during workouts can help you maintain the right intensity, find a sweet spot for pace or avoid overtraining.
During workouts, use Fitbit’s heart rate zones to gauge how much effort you’re exerting and see if you should dial it up or dial it back. Afterward, check your workout summary in the Fitbit app to view your time in each zone and to follow improvements over time.
Get the full experience in the Fitbit app.
Charge 2 syncs wirelessly and automatically to 200+ iPhone, Android and Windows devices.
Set weekly exercise goals to keep yourself accountable, and see summaries of your key workout stats.
See your workout stats, their impact on your day, and how your performance is improving.
Track Heart RateTrack your resting heart rate trends to understand how your health and fitness changes over time.
Reach your weight goals by planning meals, logging food, and tracking your weight, BMI, lean mass & body fat.
- Fitbit Charge 2 tracker
- Charge 2 Classic wristband
- Charging cable
Sensors & Components
- Optical heart rate tracker
- 3-axis accelerometer
- Vibration motor
Like all heart rate tracking technologies, accuracy is affected by physiology, location of device, and different movements.
Battery and Power
We recommend charging your device every few days to ensure that you're always tracking.
Battery life up to 5 days. Battery life and charge cycles vary with use, settings, and other factors; actual results will vary.
- Battery type: Lithium-polymer
- Charge time: One to two hours
- Radio transceiver: Bluetooth 4.0
- Saves 7 days of detailed motion data – minute by minute.
- Saves daily totals for past 30 days
- Stores heart rate data at 1 second intervals during exercise tracking and at 5 second intervals all other times
Fitbit Charge 2 is sweat, rain and splash proof. However, the device is not swim proof or shower proof. With any wearable device, it’s best for your skin if the band stays dry and clean.
If the band gets wet or if you sweat in it, remove and completely dry the band before putting it back on. Give your wrist a rest by taking the band off every now and then.
Fitbit Charge 2's wristband is made of a flexible, durable elastomer material similar to that used in many sports watches. Fitbit Charge 2 also has a surgical-grade stainless steel buckle.
- Operating temperature: -10° to 45° C
- Maximum operating altitude: 9,144 m
Syncing & Notifications
Using Bluetooth LE wireless technology, Fitbit Charge 2 sends smartphone notifications and syncs automatically to computers and 200+ leading iOS, Android and Windows devices. Certain features like smartphone notifications or Connected GPS may require Android 5.0+.
- Syncing range: Up to 6.1 m
- 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.