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App Support Devices

Android, iOS, Windows


Battery life up to 5 days. Battery life and charge cycles vary with use, settings, and other factors, Battery type: Lithium-polymer, Charge time: One to two hours.





Black Silver



Water Resistant

Rain, Sweat and Shower Proof

Wear & Care

Our products are meant to be worn all day and night*, so its important to follow a few simple guidelines as you wear and care for your device.

To keep your band clean and your skin happy, our board of certified dermatologists have outlined the following tips


Certain features like Auto Sleep Tracking and SmartTrack may be disabled when using this accessory. Classic accessory bands are the recommended accessory for high intensity workouts and sleep tracking.

Do not wear the Flex 2 Pendant accessory while sleeping or during high intensity activity, as doing so could create a choking hazard.

Flex 2 Pendant accessories contain magnets. Magnets may interfere with pacemakers, defibrillators, or other medical devices. Consult your physician and the manufacturer of your medical device before using to determine if these accessories are safe for you. If the accessories may be interfering with your pacemaker, defibrillator, or other medical device, do not wear the accessories.

Keep it Dry

While Fitbit devices are water resistant*, its not good for your skin to wear a wet band for long periods of time.

If your elastomer band gets wetlike after sweating or showeringrinse and dry it thoroughly before putting it back on your wrist.

Be sure your skin is dry before you put your band back on.

Even though Fitbit Flex 2 is swim-proof, its important to thoroughly dry your classic elastomer band and tracker, and remove any debris from your device after wear in the water, to avoid skin irritation. Please note that non-elastomer accessories should not be worn in water.

Dont Wear It Too Tight

Make sure your band isnt too tight. Wear the band loosely enough that it can move back and forth on your wrist.

If you use Fitbit Charge HR, Fitbit Blaze or Fitbit Surge, for better heart rate readings during exercise, we suggest wearing the band so its secure, but not too tight, and wearing the band higher on your wrist (about 2-3 finger widths above your wrist bone). Lower the band on your wrist and loosen it after exercise. Learn more.

Give Your Wrist a Rest

Prolonged rubbing and pressure may irritate the skin, so give your wrist a break by removing the band for an hour after extended wear.

Other Tips

If you have eczema, allergies or asthma you may be more likely to experience a skin irritation or allergy from a wearable device.

Whether you have the conditions above or not, if you start to experience redness or skin irritation on your wrist, remove your device. If symptoms persist longer than 2-3 days of not using your device, contact a dermatologist.

If you sweat for more than two hours while wearing your Fitbit band, be sure to wash your band and your wrist using the directions above to avoid skin irritation.

A better you start with heart.

Track heart rate continuously on your wrist to maximize workouts, better track calorie burns and get a clearer picture of your healthall without an uncomfortable chest strap.

Conquer your day. Shed light on your night.

All-Day Activity Tracking

Track steps, distance, calories burned, floors climbed, active minutes & hourly activity with up to 5-day battery life.

Reminders to Move

To help you stay active throughout the day, Charge 2 sends Reminders to Move that encourage you to take 250 steps every hour.

Auto Sleep Tracking

Charge 2 automatically tracks how long and how well you sleep to help you work toward a better routine.

Silent Alarm

Wake up peacefully with a silent vibrating alarm, and create a sleep schedule in the app to stay on track toward your goals.

Push your fitness further.

Multi-Sport Modes

Track specific exercises like running, weights or yoga to see your workout stats on display.

Connected GPS

Connect to your phones GPS to see real-time run stats like pace and distance on your wrist, and a map of your route post-workout.


Charge 2 automatically records select exercises like hiking, biking, sports and more, so you get credit even if you forget to log a workout.

Cardio Fitness Level, Powered by Pure Pulse

Get a better understanding of your fitness level and see how you can improve over time with a personalized Cardio Fitness Score.

Take time to breathe.

Guided Breathing Sessions

Find moments of calm throughout your day with personalized breathing sessions based on your real-time heart rate.

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Fitbit Band Charge2 FB407 Black Silver Small


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