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Fitbit Flex (Black)

Flex™ Wireless Activity And Sleep Tracker Wristband

Fitbit
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• Track Your Activity And Sleep
• Sync Stats To Your Computer/Smartphone
• Visualize Progress Through Free Graphs/Charts
• Operating Time: 5-7 Days
• Includes Small And Large Interchangeable Wristbands
• Log Activities And Meals With The Fitbit App
• Color: Black

Learn more about the flex-black

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Description


Fitbit One

MAKE FITNESS A LIFESTYLE

This slim, stylish device is with you all the time. During the day, it tracks steps, distance, and calories burned. At night, it tracks your sleep quality and wakes you silently in the morning. Just check out the lights to see how you stack up against your personal goal. It’s the motivation you need to get out and be more active.

HELPS YOU GET YOUR SLEEP

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.

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. Flex also 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.


The Fitbit One™ Tracks:
  • Steps Taken
  • Calories Burned
  • Distance Traveled
  • Active Minutes
  • Hours Slept
  • Quality of Sleep

General Features:

  • The Fitbit Flex™
  • Track your activity and sleep
  • Sync stats to your computer/smartphone
  • Visualize your progress through free graphs, charts and other tools
  • Challenge friends, set goals and earn badges with the Fitbit App
  • Silent wake alarm to awake with a gentle vibration
  • Discreet, comfortable wristband design
  • Includes small and large interchangeable wristbands
  • Built-in rechargeable battery
  • Operating Time: 5-7 days
  • Rain, splash and sweat-proof
  • Achievement alerts for when you're close to your goals
  • Log your activities and meals easily with the free Fitbit app
  • Color: Black
  • Also available in Slate
  • Clip style models, One Black and One Burgundy also available
  • 1-year Manufacturer's Warranty

Specifications & Details


Fitness Tracker Design
Wearing Style
Wristband
Wristband Size
Small
Large
Controls Type
LED Buttons
Water Resistant
Waterproof
Maximum Operating Altitude
30000 feet
Primary Color (Fitness Trackers)
Black
LED Status Indicators
White
Display Type (Fitness Trackers)
LED
Connectivity Features
Compatible Smartphone Apps
Endomondo
Fitbit
Lose It!
Map My Fitness
My Fitness Pal
Run Keeper
Spark People
Compatible Devices (Fitness Trackers)
iOS
Android
Mac
PC
Sync Type
Bluetooth
Functionality Features
Charging Type
USB Cable
Battery Life (Fitness Trackers)
120 hours
Countdown Timer/Stopwatch
None
Sensor Type (Fitness Trackers)
Accelerometer
Clock (Fitness Trackers)
No
Alarm Type
Vibration
Device Tracks
Active Minutes
Calories Burned
Distance Traveled
GPS Location
Sleep Information
Steps Taken
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

FB401BK

Weight:

0.30lbs

Internal SKU:

flex-black

Internal Product ID:

81812

Customer Ratings & Reviews


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Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.