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  • Slim and stylish wristband doesn't scream fitness tracker, but subtly says, "check out my cool rubber bracelet"; includes a small and large wristband for the perfect fit
  • The Flex tracks your steps taken, calories burned, hours slept, distance traveled, minutes active and your quality of sleep
  • Silent wake alarm gently vibrates to wake you—no more terrifying alarm clock noises!
  • 5 built-in LED indicator lights let you monitor your progress; each light represents meeting 20% of your goal
  • Water-, sweat-, and rain-resistant design. Not intended for prolonged submersion
  • Download the iPhone or Android app and sync your real-time stats via Bluetooth® to track your progress throughout the day
  • App also lets you set goals, log food and workouts and monitor your sleep trends
  • Sleep tracker automatically identifies and tracks how long and how well you sleep; no need to turn on a specific sleep mode
  • Make fitness social by connecting with friends through the app to share results, compete with each other, or simply share some encouragement
  • Rechargable lithium-polymer battery lasts 5 - 7 days per charge
  • Please note: Battery life and charge cycles vary with use, settings and other factors; actual results may vary
  • The Flex Wireless Activity & Sleep Wristband includes the tracker, small and large wristbands, charging cable and a wireless sync dongle USB device
  • Compatible with iPhone 4S and newer, iPad 3rd generation and newer, iPod touch 5th generation, Samsung Galaxy S III, Samsung Note II, PCs and Macs


View all Fitbit Activity Trackers

REI membership


Best Use Fitness
Tracks Steps Yes
Pedometer Type Digital 3-axis Accelerometer
Tracks Calories Burned Yes
Sleep Tracking Yes
Alarm Yes
Battery Type Lithium Polymer
Average Battery Life 5 days
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