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  • Product Description
  • Product Features
  • Technical Specification
  • Additional Information
  • Customer Reviews
  • Questions and Answers

MPN: FB401BK EAN: 898628002687

Fitbit Fitbit Flex FB401 Wireless Activity and Sleep Wrist Band 

Never stop moving with Fitbit Flex. Wear this slim, stylish device all the time and get the motivation you need to get out and be more active. It tracks steps, distance, and calories burned and shows you how you’re stacking up against your daily goals. At night, it tracks your sleep cycle, helps you learn how to sleep betterand wakes you silently in the morning. Access your stats anytime on your computer, tablet, or from smartphones – both iPhone and Android. Flex is your perfect companion, and stays with you everywhere - even in the shower.
Small 5.5"–6.5" 14.0 cm–16.5 cm
Large 6.5"–7.7" 16.5 cm–19.6 cm
X Large 7.7"–8.9" 19.6 cm–22.6 cm

Product Features

  • Helps you get your ZZZs
    Flex never sleeps, even when you do. Continue to wear it all night and it'll measure your sleep quality. Your dashboard will reveal how long you slept and the number of times you woke up to help you learn how to sleep more soundly. Flex also has a silent wake alarm that gently vibrates to wake you at your desired time, without disturbing your partner.
  • Always by your side
    Flex is your perfect companion. It fits comfortably around your wrist so you can wear it proudly all day and night.
  • Wireless sync
    Connect to any computer with Fitbit's wireless sync dongle (included). Sync occurs automatically when your tracker sits within 20 feet of a dongle.
  • Sync your stats, see your progress
    Flex automatically syncs your data to PCs, Macs, many iOS devices and select Android phones without plugging in or pushing buttons. This gives you real-time access to your stats on the Fitbit dashboard throughout the day. Also with select NFC-enabled Android devices, you can tap your device to launch your Fitbit stats. It's like magic.
  • Bluetooth 4.0
    Fitbit's trackers are the first all-day activity trackers to offer Bluetooth 4.0 connectivity, delivering real-time stats without sapping your phone's battery. Flex will sync without you doing a thing.
  • Discover your trends
    Flex comes with free online tools and a mobile app that allow you to set goals and follow your progress through awesome graphs and charts. Log food, workouts and much more and get the inside scoop on your health. Knowing how close you are to reaching your goals gives you the motivation to reach them and aim higher.

Technical Specification

Product DescriptionFitbit Flex activity tracker - slate
Product TypeActivity tracker
ConnectivityBluetooth
Tracking DataDistance, calories burned, activity, sleep activity, steps taken
Battery Run TimeUp to 120 hours
ColourSlate
Dimensions (WxDxH)15.2 mm x 9.5 mm
Weight11.34 g