Fitbit Flex®

Fitness Wristband

Be the first to know when it’s available.

  • All-Day Activity

    Track steps, distance, calories burned, active minutes, hourly activity and stationary time.

    Progress Display

    See LEDs light up as you progress toward your daily goal.

    Auto Sleep Tracking & Silent Alarms

    Automatically track your sleep quality & wake up peacefully with a silent alarm.

  • Interchangeable Accessories

    Style Flex your way with accessories from Fitbit and Tory Burch.

    Long Battery Life

    Battery life up to 5 days so you can track all day and night without needing a charge.*

    Wireless Syncing

    Sync stats wirelessly & automatically to computers and 200+ leading iOS, Android and Windows devices.

*Battery life and charge cycles vary with use, settings, and other factors; actual results will vary. Smartphone notifications unavailable on Windows devices.

Print this guide to find the right size for you, and size up if you’re in between sizes.
Flex includes both small and large wristbands.

  • Small

    Fits wrists 5.5" - 6.5" in circumference

  • Large

    Fits wrists 6.5" - 8.2" in circumference


  • What's Included

    • Removable Fitbit Flex tracker
    • 2 Flex wristbands (small and large)
    • Charging cable
    • Wireless sync dongle

    Sensors & Components

    • 3-axis accelerometer
    • Vibration motor


    • LED display with 5 white indicator lights
    • Tap twice to see progress against your Main Goal
    • Tap rapidly for 1-2 seconds to start or stop sleep tracking

    Battery and Power

    We recommend charging your Fitbit Flex every few days to ensure you are 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
  • Memory

    • Saves 7 days of detailed motion data – minute by minute.
    • Saves daily totals for past 30 days

    Water Resistance

    Fitbit Flex is sweat, rain and splash proof. However, the device is not swim proof or showerproof. 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. Learn more.


    The Fitbit Flex wristband is made of a flexible, durable elastomer material similar to that used in many sports watches. Flex also has a surgical-grade stainless steel clasp.

  • Environmental Requirements

    • Operating temperature: -4° to 113° F
    • Maximum operating altitude: 30,000 feet


    Fitbit Flex syncs automatically and wirelessly to computers and 200+ leading iOS, Android and Windows devices using Bluetooth 4.0 wireless technology.

    • Syncing range: Up to 20 feet
    • Syncing to computers requires Internet connection and USB port
    • Syncing to mobile devices requires Bluetooth and Internet connection
    • Syncs with Windows Vista and later, Mac OS X 10.6 and up, iPhone 4S and later, iPad 3 gen. and later, and leading Android and Windows devices

Shop accessory bands for Fitbit Flex®

You might also like:

Not done looking? There's more to explore. Keep Shopping

The perks of shopping

  • Free shipping on $50+

  • 45-day money back guarantee

  • 1 year limited warranty

Fitbit 2-Year Protection Plan with Accidental Damage Coverage


  • Coverage: Covers damage from accidents like drops, spills, cracked screens from Day 1 and mechanical and electrical breakdowns after the Fitbit manufacturer warranty.
  • Protection Length: 2 years
  • Deductible Fee: per claim
  • Perks: 24/7 phone and online support, free shipping
  • Contract Delivery: Email
  • Cancellation: Cancel anytime—full refund if cancelled within the first 45 days of purchase

Terms & Conditions

Protect Your Purchase

  • Get 2 Year Accidental Damage & Handling Protection for

No thanks

Terms & Conditions

Let's talk!

Let a Fitbit Sales Specialist assist you in finding the right product.

(844) 434-8248

Need customer support? Click here.