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Fitbit FB401NY Flex Wireless Activity And Sleep Wristband Navy

Set a goal and go

Flex allows you to set a goal and uses LED lights to show how you're stacking up. Each light represents 20% of your goal. You choose which one — steps, calories, or distance. It lights up like a scoreboard, challenging you to be more active day after day.

FLEX TRACKS:
STEPS TAKEN, DISTANCE TRAVELED, CALORIES BURNED, ACTIVE MINUTES, HOURS SLEPT, QUALITY OF SLEEP

Powered by Fitbit's leading-edge accelerometer, Flex bases calculations like calories burned on your personal profile — reflecting your stats, not any average Joe's.

Helps you get  your ZZZs

Flex never sleeps, even when you do. Continue to wear it all night and it’ll measure your sleep quality. Your dashboard will reveal how long you slept and the number of times you woke up to help you learn how to sleep more soundly. Flex also has a silent wake alarm that gently vibrates to wake you at your desired time, without disturbing your partner.


At Night, Flex Tracks: 
  • How long and well you sleep
  • How many times you wake up
In The Morning It:
  • Wakes you with a silent alarm
  • Won't bother your partner

Always by your side

Flex is your perfect companion. It fits comfortably around your wrist so you can wear it proudly all day and night.

  • Easy to wear
  • Reminds you to keep moving
  • With you all the time
  • Water-resistant


Sync your stats. See your progress
Flex automatically syncs your data to PCs, Macs, many iOS devices and select Android phones without plugging in or pushing buttons. This gives you real-time access to your stats on the Fitbit dashboard throughout the day. Also with select NFC-enabled Android devices, you can tap your device to launch your Fitbit stats. It's like magic.

Discover your trends
Flex comes with free online tools and a mobile app that allow you to set goals and follow your progress through awesome graphs and charts.

Log food, workouts and much more and get the inside scoop on your health. Knowing how close you are to reaching your goals gives you the motivation to reach them and aim higher.


Make the most of workouts with MobileRun
TRACK RUNS & HIKES
Use GPS from your phone to track key run and hike stats like pace, time, splits and distance.

MAP ROUTES
View your routes and mile markers as you move, then scroll through your run history and route maps.

RECORD WORKOUTS
Log workouts in seconds and see them appear instantly on your monthly exercise calendar.

VOICE CUES & MUSIC CONTROL
Get on-the-go pace and distance stats with voice cues, and control your music right from the app.

Flexibility to match your style
Flex tracker is flexible. You can take this tiny tracker out and put into any of Flex's colorful bands to fit your mood. Check out our accessory band colors and look good no matter what you're wearing.

Plays well with other apps

Weight trends can be influenced by a variety of fitness and nutrition factors. Fitbit works with several popular health apps that let you export your Fitbit data their way. Some, like Lose It!, also let you import their data into your Fitbit dashboard, so you can track your stats in either location. Learn more in our App Gallery.

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