Fitbit Flex®

Fitness Wristband

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.

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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

Display

  • 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.

Care

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.

Materials

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: -20° to 45° C
  • Maximum operating altitude: 9,144 m

Syncing

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 6.1 m
  • 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

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