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  • Fitbit Flex Wireless Activity + Sleep Wristband, Black
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Fitbit Flex Wireless Activity + Sleep Wristband, Black

by Fitbit
| 1000+ answered questions

Price: $99.95 & FREE Shipping. Details
In Stock.
Ships from and sold by Amazon.com. Gift-wrap available.
Black
  • Tracks steps, distance, calories burned and active minutes
  • Monitor how long and well you sleep
  • Wakes you (and not your partner) with a silent wake alarm
  • LED lights show how your day is stacking up against your goal
  • Slim, comfortable and easy to wear (sold with both large and small wristbands included)
  • Includes small and large wristbands
65 new from $93.37

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Frequently Bought Together

Fitbit Flex Wireless Activity + Sleep Wristband, Black + The Friendly Swede Silicone Fasteners for Fitbit Flex Wristband (12 Pack)
Price for both: $111.94

Buy the selected items together


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Product Description

Color: Black

Product Description

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 better, and wakes you silently in the morning. Access your stats anytime on your computer, tablet or from leading smartphones – both iPhone and Android. Flex is your perfect companion, it's with you everywhere...even in the shower. Plus, it looks good no matter what you're wearing.


FREQUENTLY ASKED QUESTIONS

What mobile devices are supported for syncing?

The Fitbit Flex can sync directly to select iOS and Android devices. IOS: iPhone 4S, iPhone 5, 5S, 5C, iPod Touch (5th gen.), iPad 3, iPad 4, iPad mini. Android: Samsung Galaxy Note 10.1, Samsung Galaxy Note II, Samsung Galaxy S III, Samsung Galaxy S4

How do I charge my flex?

Your tracker battery lasts for about 5 days. To charge it, remove the tracker from the band and place it in the charger until all 5 lights are solid.

If you are having trouble, your tracker's charging contacts may be obstructed by microscopic dirt or debris that prevents them from making a good connection to the charger. Use hand sanitizer and a tissue or dampen a cotton swab with rubbing alcohol and carefully clean the charging contacts on your tracker. Do not submerge your tracker in water or use abrasive cleaners. Thoroughly dry your tracker before attempting to charge. Be sure to fully seat your tracker into the charger, with the charging contacts fully inserted into the charging cable enclosure.

How do I reset my tracker?

lf your tracker is not responding, it may be fixed by restarting.

1. Plug your charging cable into the USB port and insert your tracker into the charging cable.
2. Insert a paperclip into the small pinhole on the back of the charger.
3. Press on the pinhole for 3-4 seconds.

Your Flex will now be reset. Take your tracker out of the charger and insert it back into the wristband.

Can the wristband irritate my skin?
The Flex wristband is made of a flexible, durable elastomer material similar to that used in many sports watches. It does not contain latex. The clasp is made of surgical-grade stainless steel and contains traces of nickel. As with any type of jewelry, some people may experience allergies. Numerous factors can cause an allergy, such as a nickel sensitivity, reactions to bacteria that can accumulate in watch wristbands or other wearable devices, a reaction between the wristband and your soap or perspiration, or an allergy to the material of the wristband. If you notice any signs of skin irritation or experience any discomfort, please discontinue use.

From the Manufacturer

Fitbit Flex Wireless Activity + Sleep Wristband

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 better, and 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.


At a Glance


Flexibility to Match Your Style


Sizing

  • Tracks steps, distance, calories burned, and active minutes
  • Log food, weight, and more on Fitbit’s website or apps
  • Monitors how long and how well you sleep
  • Wakes you (not your partner) with a silent wake alarm
  • LED lights show how your day is stacking up against your goal
  • Set goals, view progress, and earn badges
  • Share and compete with friends throughout the day
  • Syncs automatically with select mobile devices and to your computer
  • Free iPhone and Android App
  • Instantly launch your Fitbit app by tapping your device with your NFC-enabled Android phone
  • Easy-to-wear, slim, comfortable wristband
  • Available in two stylish colors – black and slate
  • Accessory bands allow you to personalize your Flex
  • Wear all day and night - even in the shower
  • Rechargeable battery

What's in the Box

Flex Tracker, Large and Small Bands, Charging Cable, Wireless Sync Dongle, and Free Fitbit Account

Flex tracker is flexible. You can take this tiny tracker out and put into any of Flex's colorful bands to fit your mood.

Comes in:

  • Black
  • Slate

Accessory Bands (Sold Separately):

  • Navy
  • Tangerine
  • Teal

Flex wristband is sold with both small and large wristbands included. Click here to use the Flex Sizing Tool.


Set Your Goal. Sync Your Stats.

Goals and Tracking

Flex uses LED lights to show you how you’re stacking up against your daily goal. Each light represents 20% of your goal. You choose which one – steps, calories, or distance. It lights up like a scoreboard, giving you the motivation you need to get up and keep moving. Just check your stats right on your phone.

Wireless Sync

Flex syncs your info to select Bluetooth 4.0 devices, without plugging in or pushing buttons. It also syncs with select Android devices (Samsung Galaxy S III, Note II, and more), as well iOS devices (iPhone 5, 4S, iPad 3rd gen., iPad Mini, and more) and PCs and Macs. This gives you real-time access to your stats on the Fitbit dashboard throughout the day. Plus, with select NFC-enabled Android phones, simply tap your device to launch your Fitbit stats.

Dashboard

Flex comes with an arsenal of free online tools. Set goals on your personal dashboard and follow your progress through engaging graphs and charts. Use the Fitbit App for iPhone and Android to track steps, distance, calories, active minutes, and sleep, and receive goal progress notifications and milestone updates.

Compatability

Flex syncs with popular fitness apps for an integrated fitness regiment. Apps include Sparkpeople, LoseIt!, MyFitnessPal, MapMyFitness, Runkeeper, and Endomondo.

Badges

Flex keeps you motivated and helps you reach and celebrate milestones by awarding badges as you reach daily and lifetime achievements and goals.

Community

Enlist your friends and family in helping you reach your goals by sharing your stats, creating fitness challenges, and taking a group leader board challenge.

Logging

Log food consumption, weight, and weight changes, and additional workout info on the website and on the go using the Fitbit App for iPhone and Android.

Wear It All the Time

Flex never leaves your side - you can even wear it in the shower. Wear the comfortable wristband all day and night, and it will even track how long and how well you sleep. Online tools illustrate your deep sleep and wakeful patterns. Silent Wake technology wakes you with a gentle vibration at a desired time without an alarm or disturbing your partner.


Product Details

Color: Black
Product Warranty: For warranty information about this product, please click here. [PDF]
  • Product Dimensions: 0.6 x 0.4 x 8.2 inches
  • Shipping Weight: 4.8 ounces (View shipping rates and policies)
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • Origin: China
  • ASIN: B00BGO0Q9O
  • UPC: 898628002649
  • Item model number: FB401BK
  • Average Customer Review: 3.6 out of 5 stars  See all reviews (10,381 customer reviews)
  • Amazon Best Sellers Rank: #15 in Health & Personal Care (See Top 100 in Health & Personal Care)
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Customer Reviews

I purchased this fitbit 2 1/2 months ago and now it has stopped working.
Anonymous
I really like it because it provides great motivation to keep moving and reach fitness goals.
Andrea Chesick
I like that it's water resistant and that I can wear it swimming or in the shower.
PT Cruiser

Most Helpful Customer Reviews

1,359 of 1,411 people found the following review helpful By PT Cruiser TOP 50 REVIEWERVINE VOICE on January 11, 2014
Color Name: Black Verified Purchase
Update 7/3/14 - Fitbit just came out with a new upgrade to the Fitbit app which adds some very cool GPS features and a bar code scanner in the Food Log. I'm adding details at the end of this review.

I bought 3 of these fitbit flex devices, one for myself, my husband and my sister. Before purchasing I researched several wristband devices such as the Jawbone UP, the Nike Fuel and and the Polar Loop. I also looked at the fitbit force which is a newer version of this band. The lack of water resistance on the force was a deal breaker for me. I wanted to be able to wear this band 24/7 and to be able to wear it in the shower or when swimming. That was part of what made it attractive to me. Also, after reading reviews about the clasp problems on the force and how many people lost them, I wanted no part of that. They are also quite a bit bigger and look clunckier. The wristband on the UP looked like it would catch on everything and had no display at all. The Polar had lots of quality problems. I wasn't crazy about the looks of the Nike. The display is nice and I can see how people would like them, but not my style. The fitbit flex, to my tastes, had the coolest look. I also know a couple of people who own the fitbit flex and they were very enthusiastic about them so that influenced me as well.

So here is what I like about the flex: I like the way it looks on my wrist. All of us got the slate color. You can also order bands in a few different colors, both here and on the Fitbit site. It is lightweight and even though I don't often wear a watch I don't notice this on my wrist at all. The clasp was VERY difficult to secure the first couple of times until the rubber softened up a bit and until I got the hang of it. I secured it off of my wrist a couple times when it was new.
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5,627 of 5,873 people found the following review helpful By D. Graves TOP 1000 REVIEWER on April 16, 2013
Color Name: Black
I obtained the Flex 2 years ago, before it was available to retailers. Since then, I've seen this product receive thousands of 5-star "reviews", 98% of which are less than a sentence long, left by people who just bought the thing and/or could not buy a clue as to the product's inherent inaccuracies and flaws. I advise you to read the nearly 4 THOUSAND negative reviews if you doubt what I state about the Flex in my original review, below. Do not waste a hundred dollars on this thing: the longer you have it the more useless the thing seems and recent shipments are far worse than earlier ones, with much flimsier construction.

I used the word 'phony' in the title not only to denote the clueless, 3-word "Love my Fitbit!" reviews by Bambi (yes, there are shiny all-color charts and graphs and tons of numbers generated by the Fitbit software but it's usually way off in accuracy; that is, it's all useless) but also the intentionally-misleading 5-star reviews by "professional" Amazon reviewers (those hell-bent on achieving 'Top 50 Reviewer' "status" or whatever: they give products 5 stars because those reviews always receive the most positive votes and the least negative). The Fitbit company must love these guys, continuing to get Amazon buyers to buy this discredited piece of junk. I strongly advise you to start reading the other nearly 4,000 negative reviews if you are swayed by positive reviews towards buying this thing.

Note: my original rating was 3 stars but over time my experience with it - and having read so many other valid criticisms of it - I've changed it to 2. As bad as it is, I can't give it just 1 star, for reasons explained below.
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3,412 of 3,584 people found the following review helpful By RST_ HALL OF FAMETOP 50 REVIEWER on May 17, 2013
Color Name: Black Verified Purchase
Several asked my opinion of the Flex after I had compared UP to ONE last fall. I'm more pleased with Flex than expected. This review will be specifically for those comparing the Jawbone UP to the Fitbit Flex. For those interested in my review of the One and Jawbone UP it is located here: UP by Jawbone - Large Wristband - Retail Packaging - Onyx:
---------------------

UPDATE: I uploaded several head-to-head app screenshots.

UPDATE: I've found that I am storing quite a bit of water in the Flex band pouch where the module goes. Even though they say it's shower safe, I'm pretty sure some funky stuff is going to be growing in there in a matter of time... But the band is replaceable!

---------------------

My journey with personal monitoring devices/pedometers started a LONG time ago: Before Fitbit even existed, with a device called the SportBrain. It was a traditional belt clip style so old that it plugged into a base that used a dial in phone modem to upload the usage data to a server. It was old. But my interest in devices that can help monitor and tell me about my activity started then, and we seem to be now in a golden age of personal data monitoring devices. Fitbit Flex, Jawbone UP, all of the Fitbit clip devices and so many more...

Hardware itself

The biggest drawbacks I found on the Jawbone UP were that it had no visual feedback about your daily achievement toward your goal and the fact that it had no visual battery indicator. It wasn't a problem for me personally, but for those who are hardcore driven on a daily basis to compare and achieve this could be a drawback for you.
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