Health Care   >  Fitness Bands & Trackers   >  Fitbit   >  Fitbit Flex FB401BK Wireless Activity + Sleep Fitness Band, Black
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Fitbit Flex FB401BK Wireless Activity + Sleep Fitness Band, Black
Key Features
  • Made of a flexible, durable elastomer material
  • Surgical-grade stainless steel buckle
  • LED display with 5 white indicator lights
  • 3-axis accelerometers
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Finance Schemes (2)
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  • Warranty: 1 Year manufacturer warranty
  • MRP: ₹6,990
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  • Description
  • Specifications

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.

Water Resistance
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.


  • 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

  • Specifications

    General Information
      Product Type
      Fitness Band
      Flex FB401BK
    Additional Features
    • 3-axis accelerometers
    • Vibration motor
    • LED display with 5 white indicator lights
    • Made of a flexible, durable elastomer material
    • Surgical-grade stainless steel buckle.
    • Battery life: 10-14 days
    • Charge time: One to two hours
    • Tracks 7 days of detailed motion data, minute by minute
    • Tracks daily totals for past 30 days
    In The Box & Warranty
      1 Year
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