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

by Fitbit
| 303 answered questions

Price: $99.95 & FREE Shipping
In Stock.
Ships from and sold by Heart Rate Monitors USA.
Slate
  • 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)
  • *Syncs directly to select iOS and Android devices, see FAQs below for compatible devices
23 new from $92.95

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Frequently Bought Together

Fitbit Flex Wireless Activity + Sleep Wristband, Slate + Fitbit Flex Wristband Accessory Pack, Small
Price for both: $121.94

These items are shipped from and sold by different sellers.

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Important Information

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Actual product packaging and materials may contain more and different information than what is shown on our website. We recommend that you do not rely solely on the information presented and that you always read labels, warnings, and directions before using or consuming a product. Please see our full disclaimer below.

Product Description

Color: Slate

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: Slate
Product Warranty: For warranty information about this product, please click here [PDF]| Manual [PDF]
  • Product Dimensions: 0.6 x 0.4 x 8.2 inches ; 0.3 ounces
  • Shipping Weight: 0.3 ounces (View shipping rates and policies)
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • Origin: China
  • ASIN: B00BGO0QEO
  • UPC: 898628002656
  • Item model number: FB401SL
  • Average Customer Review: 3.7 out of 5 stars  See all reviews (9,182 customer reviews)
  • Amazon Best Sellers Rank: #6 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 like that it's water resistant and that I can wear it swimming or in the shower.
PT Cruiser
It is a great motivational tool to help you keep on track with your fitness goals.
Spencer

Most Helpful Customer Reviews

5,027 of 5,242 people found the following review helpful By D. Graves TOP 1000 REVIEWER on April 16, 2013
Color Name: Black
The Flex is pretty good - IF you understand its limitations. And it has a lot of them. This is a 1.0 version, the first wrist-based tracker Fitbit has produced. Since the positive reviewer claims the Flex clearly wins its 'fight' over the Jawbone Up, I strongly suggest you wait for the technology to be refined by Fitbit (and others) before spending $100 or more on this.

I also suggest that you tune out the 5-star "this is AWESOME!" reviewers. I've had the Flex for 6 months now (acquired at CES 2013, long before retail availability) and initially I too was impressed by the technology. However, with long-term use, I think its inaccuracies make it nothing more than a pedometer with sleep analysis added in (and the usefulness of the latter is dubious as well). The IDEA of it all is excellent: to track your activities and see your progress over time via the great software that Fitbit has developed. However, all of this is predicated on the device accurately tracking your movements. If it fails in that aspect - and unfortunately it does, to a moderate degree - then all of the data and impressive charts and graphs are rather useless. The "awesome!" reviewers don't realize this (yet) and just assume what they're seeing is real; it isn't.

The underlying technological problem, as I see it, is in the placement of the tracker. Up until now, Fitbit trackers were to be placed on the torso. Now, it must be placed on the wrist (yes, the tracker itself can be taken out of the wristband and put into your pocket but all of Fitbit's calibrations and algorithms are designed for that wrist placement and you are making the problem worse by not having it on your wrist).
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3,254 of 3,411 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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831 of 868 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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