Set a goal and go:
- Stay focused on your goals and get motivated to be more active with Flex—a slim, stylish device that tracks all-day activity like steps taken, distance traveled, calories burned and active minutes.
See your day in a whole new light:
- Flex lets you see how every day is stacking up with LEDs that light up like a scoreboard as you get 20% closer to completing your step, calorie or distance goal.
Step. Sleep. Wake. Repeat:
- Flex never sleeps—even when you do. Wear it all night to measure your sleep quality and how long you slept. Then, wake with a silent, vibrating alarm to start your day stepping on the right foot.
Wear Flex your way, every day:
- Style your Flex tracker with bright accessory bands, or turn it into a fashion piece with our exclusive Flex collection from Tory Burch. To change bands, simply pop the slim Flex tracker out of your wristband and slip it into the accessory that fits your personality.
All your stats, always in sync:
- Flex syncs your daily stats to your computer and over 150 leading smartphones, and shows your progress in easy-to-read charts and graphs, to give you the push you need to keep moving toward your goals.
With you all the time:
- Flex fits comfortably around your wrist, is water-resistant, and has a 5-day battery life, so you can wear it day to night. And with a variety of available accessory bands, you’ll find the right Flex for every occasion.
App + Dashboard:
- See progress: View your progress and analyze your trends with easy-to-read charts and graphs
- Share + compete: Invite friends and family to share stats, send cheers & taunts, & compete on the leaderboard
- Log food: Log food fast with a barcode scanner, calorie estimator, meal shortcuts & expanded food database
- Record workouts: Log workouts, see a monthly exercise calendar, & use MobileRun to track run stats and map routes
- Earn badges: Get goal progress notifications & celebrate fitness milestones with badges
Sensors and Components:
- 3-axis accelerometers
- 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
- Removable Fitbit Flex tracker
- 2 wristbands (small and large)
- Charging cable Wireless sync dongle
Flex has been tested up to 1 ATM meaning it is sweat, rain and splash proof. However, the device is not swim proof. We also recommend taking Flex off before showering because, as 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. Clean the band with a mild soap-free cleanser like Cetaphil or Aquanil. Give your wrist a rest by taking the band off every now and then. Learn more.
The 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.
Battery and Power:
We recommend charging your One weekly to ensure you are always tracking.
- Battery life: 10-14 days
- Battery type: Lithium-polymer
- Charge time: One to two hours
- Radio transceiver: Bluetooth 4.0
- Operating temperature: -20° to 45° C
- Maximum operating altitude: 9.144 km
- Tracks 7 days of detailed motion data, minute by minute
- Tracks daily totals for past 30 days
Flex syncs automatically and wirelessly to tablets, computers and 120+ leading iOS, Android and Windows smartphones using Bluetooth 4.0 wireless technology.
- Syncing range: 6 meters
- 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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