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Fitbit Flex 2, Black (US Version), 1 Count

4.1 4.1 out of 5 stars 5,369 ratings
$121.60 with 9 percent savings $121.60 per Count
Typical price: $132.99

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Purchase options and add-ons

Brand Fitbit
Color Black
Product Dimensions 10"L x 0.45"W x 0.37"H
Item Weight 18.14 g
Sensor Type Wearable

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Fitbit Flex 2, Black (US Version), 1 Count
$121.60 ($121.60/Count)
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EXMRAT Compatible with Fitbit Flex 2 Charger Cable (2Pack, 30cm/1ft), USB Charger Charging Cable for Fitbit Flex 2 (Black, 2P
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Top Brand: Fitbit

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Product Description

Product Description

Meet the all-new Fitbit Flex 2—a slim, swim-proof fitness wristband that’s ready to go wherever life takes you. The ultra-thin, removable tracker hides in bands, bangles and pendants, so you can wear it in a way that’s all your own. Automatic all-day activity and sleep tracking show you how your entire day adds up, and SmartTrack automatic exercise recognition records your exercises for you. The discreet progress display uses color-coded LED lights to keep you connected to calls, texts and Reminders to Move. Plus you don’t have to worry about getting it wet—whether you’re swimming in the pool or running in the rain. It’s the next generation model of our most iconic tracker. No fuss, all fun, and fit for every you.

Manufacturer Contact Information

Customers contact: support@fitbit.com

Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 10 x 0.45 x 0.37 inches; 0.64 ounces
  • Item model number ‏ : ‎ FB403BK
  • Department ‏ : ‎ womens
  • Batteries ‏ : ‎ 1 CR2 batteries required. (included)
  • Date First Available ‏ : ‎ August 16, 2016
  • Manufacturer ‏ : ‎ Fitbit Inc
  • ASIN ‏ : ‎ B01KH2PV4U
  • Customer Reviews:
    4.1 4.1 out of 5 stars 5,369 ratings

Product guides and documents

User Guide (PDF)

Important information

Directions

Keep it Clean: Regularly clean your band and wrist—especially after working out or sweating. Rinse the band with water or wipe it with a small amount of rubbing alcohol. Do NOT use hand soap, body soap, dish soap, hand sanitizers, cleaning wipes or household cleaners which could get trapped beneath the band and irritate skin. Always dry the band well before putting it back on. Keep it Dry: While Fitbit devices are water resistant*, it’s not good for your skin to wear a wet band for long periods of time. If your elastomer band gets wet—like after sweating or showering—rinse and dry it thoroughly before putting it back on your wrist. Be sure your skin is dry before you put your band back on. Don’t Wear It Too Tight: Make sure your band isn’t too tight. Wear the band loosely enough that it can move back and forth on your wrist. If you use Fitbit products with Purepulse Heart Rate tracking, for better heart rate readings during exercise, we suggest wearing the band so it’s secure, but not too tight, and wearing the band higher on your wrist (about 2-3 finger widths above your wrist bone). Lower the band on your wrist and loosen it after exercise. Give Your Wrist a Rest: Prolonged rubbing and pressure may irritate the skin, so give your wrist a break by removing the band for an hour after extended wear. Keep it Clean: Regularly clean your band and wrist—especially after working out or sweating. Rinse the band with water or wipe it with a small amount of rubbing alcohol. Do NOT use hand soap, body soap, dish soap, hand sanitizers, cleaning wipes or household cleaners which could get trapped beneath the band and irritate skin. Always dry the band well before putting it back on. Keep it Dry: While Fitbit devices are water resistant*, it’s not good for your skin to wear a wet band for long periods of time. If your elastomer band gets wet—like after sweating or showering—rinse and dry it thoroughly before putting it back on your wrist. Be sure your skin is dry before you put your band back on. Don’t Wear It Too Tight: Make sure your band isn’t too tight. Wear the band loosely enough that it can move back and forth on your wrist. If you use Fitbit products with Purepulse Heart Rate tracking, for better heart rate readings during exercise, we suggest wearing the band so it’s secure, but not too tight, and wearing the band higher on your wrist (about 2-3 finger widths above your wrist bone). Lower the band on your wrist and loosen it after exercise. Give Your Wrist a Rest: Prolonged rubbing and pressure may irritate the skin, so give your wrist a break by removing the band for an hour after extended wear.

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Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.

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Customer reviews

4.1 out of 5 stars
4.1 out of 5
5,369 global ratings

Customers say

Customers like the size and ease of use of the biometric monitor. For example, they say it's small, lightweight, and easy to use. Some appreciate the water resistance. That said, some complain about the battery life and connectivity. Opinions are mixed on performance, heart rate tracking, and quality.

AI-generated from the text of customer reviews

356 customers mention307 positive49 negative

Customers like the size of the biometric monitor. They say it has a small form factor, unobtrusive design, and a low profile. Some say it's lightweight and doesn't look awkward or bulky on their wrist.

"...Overall, I lover this thing! The app is superb, the Fitbit is tiny, water resistant, and holds a good charge. The band is nice too...." Read more

"...The Flex 2 is noticeably slimmer and lighter than the original Flex...." Read more

"...First the good:It is small and comfortable to wear, the band has enough adjustment to accomplish this...." Read more

"...PROS:Slim and minimalist designDurable bandWaterproof pebbleStrong, effective vibrations (alarms, notifications)..." Read more

277 customers mention222 positive55 negative

Customers find the biometric monitor easy to use. They say the app is easy to navigate, and the setup process was simple. Customers also mention that the tracker is very easy to put into the band and that the notifications are not confusing. They appreciate the simplicity and unobtrusiveness of the device.

"...on my Iphone and I am happy with the reported information, ease of navigating w/in the ap and the layout on screen.The Rest:..." Read more

"...of the pool (either flip turn or simply turning around) are very easy to distinguish, so the device accurately tracks your number of laps...." Read more

"...Tracker syncing to the iPhone app is seamless. Setting it up was easy.4) Tracks steps in real-time...." Read more

"...The tracker is very easy to put into the band. I'm slightly OCD so it takes me a few to get it the way I like it...." Read more

230 customers mention218 positive12 negative

Customers like the water resistance of the biometric monitor. They say the waterproof aspect is huge and a great plus. They like the size and waterproof features of the band. Some mention that it has the swimming function but it really only can track. That said, most are happy with the fact that it can go swimming with them and that it's great for swimming laps.

"...The app is superb, the Fitbit is tiny, water resistant, and holds a good charge. The band is nice too...." Read more

"...GREAT for swimming laps. No need to wear a separate swimming watch. 3. Update process was smooth 4...." Read more

"...The waterproof aspect is huge, and a great plus. It's also cheap in comparison to the other Fitbit models...." Read more

"...It is waterproof, it only leaves my wrist to be charged so no issues with being out in the rain, pool or the shower...." Read more

756 customers mention524 positive232 negative

Customers have mixed opinions about the performance of the biometric monitor. Some mention that it works well, provides great feedback, and is better than their phone alone. However, others say that the automatic sleep function doesn't work well, the alarm vibration is too loud, and the normal troubleshooting attempts weren't effective.

"...It worked great, better than hoped for. My first clue that this was a quantum improvement came after the first gym visit wearing the Fitbit2...." Read more

"This is a really neat product with a lot of potential, but needs some minor refinement. The waterproof aspect is huge, and a great plus...." Read more

"...Most of those qualities are incredibly poor...." Read more

"...I have this loaded on my Iphone and I am happy with the reported information, ease of navigating w/in the ap and the layout on screen...." Read more

346 customers mention236 positive110 negative

Customers are mixed about the heart rate tracking. Some mention it's a good activity tracker for someone just starting out, and the app is useful for automatically tracking sleep and exercise. However, some say the calorie tracker is a complete guess, and it does not monitor your heart rate.

"...The app is useful and allows you to automatically track sleep and exercise, while manually tracking food and water intake, weight, and female cycles...." Read more

"...Tracks steps in real-time...." Read more

"...It only accurately logs steps if the arm with it on is allowed to swing so walking a baby in a stroller, pulling a golf cart, pushing a shopping..." Read more

"...Being able to automatically detect swimming is amazing and the main reason why I bought it! The tracker is very easy to put into the band...." Read more

267 customers mention141 positive126 negative

Customers have mixed opinions about the quality of the biometric monitor. Some find it well worth the money, with a reasonable price point. Others say it's not a wise purchase, worthless, and inconvenient considering the cost. They also mention that the product has issues updating to the app and that the step tracking is wonky occasionally.

"...The band is nice too...." Read more

"...After doing a search online, it seems this is a hardware defect and has to be replaced...." Read more

"...The waterproof aspect is huge, and a great plus. It's also cheap in comparison to the other Fitbit models...." Read more

"...This thing is also exorbitantly over priced...." Read more

343 customers mention92 positive251 negative

Customers are dissatisfied with the battery life of the biometric monitor. They mention that it does not last very long, it drains too quickly, and it needs to be charged pretty frequently. Some say that the battery seems a little worse than the previous model, and that it only lasts about 5 days.

"...1. Seems to last about 5 days between charges, old one was 7. That may change as I stabilize my usage pattern. 2...." Read more

"...my old Fitbits (all 8 of them) are dead from sweat/oil intrusion, battery failure, and connectivity failure...." Read more

"...The app is superb, the Fitbit is tiny, water resistant, and holds a good charge. The band is nice too...." Read more

"...the battery charge status then out of the blue you will see a Low battery warning...." Read more

220 customers mention43 positive177 negative

Customers have issues with the connectivity of the biometric monitor. They mention that it takes a long time to sync with the phone app, and the bluetooth sync time seems longer than necessary. Some customers also say that the product requires location services to be on to synced.

"...The pebble also requires location services to be on to sync, but this isn't necessarily a fault of Fitbit, but it is why mine isn't constantly..." Read more

"...are dead from sweat/oil intrusion, battery failure, and connectivity failure. I have a graveyard of dead Fitbits in my office...." Read more

"...I have problems with getting it to sync to my phone at times...." Read more

"...Tracker syncing to the iPhone app is seamless. Setting it up was easy.4) Tracks steps in real-time...." Read more

Love it just a little upset
4 Stars
Love it just a little upset
I was really excited to get this for my birthday. I was upset when I found out it doesn't track flights of stairs. I haven't tried it out in the water yet I'm a little nervous it will get ruined because I have terrible luck. The clasps were so hard to switch between small and large bands. Honestly I think they should leave it in the large because I've never seen someone wear a small. Since my wrist isn't to big but isn't small enough to fit in a small, the extra clasp holes just move around and hang on my wrist which looks ridiculous. Maybe if they had a loop to hold the extra material in place it would look better. I have problems with getting it to sync to my phone at times. I know its not the phone alone because I have tried to do it with friends phones when theirs work perfectly. Most of the time it goes off saying I have a call but it was over an hour ago. At times fitbit.com has the updated information when the app does not which is a real bummer. I enjoy the challenges just got one a few minutes ago and it said I received it January 1st 1970. I have no clue what happened there at all!I really enjoy that I can go swimming with it. I hate running and jogging so swimming is how I burn most of my calories. With my Charge I would look up how many calories x amount of swimming would use and log it that way I knew roughly how much I was burning. Being able to automatically detect swimming is amazing and the main reason why I bought it! The tracker is very easy to put into the band. I'm slightly OCD so it takes me a few to get it the way I like it. It has to be right side up and the clasp has to be on the outer side of my wrist for personal preference. I love how small it is and the fact that the lights are not super bright and they do not turn on when you flick your wrists. With the charge I would always blind myself when I turned over in bed.Overall there are a few "minor" issues depending on your preference. Over all very good but I don't suggest switching to the Flex 2 unless you do a lot of swimming and make it worth it.
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Top reviews from the United States

Niki Z
5.0 out of 5 stars Tiny, rugged, basic, and excellent!
Reviewed in the United States on October 2, 2017
Color: BlackVerified Purchase
This summer my fiance requested a Fitbit. One night there was a sale too good to pass up, so I quickly did as much research as I could and weighed it with what my fiance wanted in a fitness band. I got her the Alta back in late June and she loved it! After having it for a week or two and really getting acquainted with it, she started showing me all the stuff it tracked in the app and I was seriously impressed. As a longtime Samsung Gear Fit user, I saw the Fitbit app blew the Gear Fit's out of the water. When I originally got my Gear Fit I wanted something that tracked my heart rate and steps but also could show me time, texts, and notifications from certain apps, as I missed wearing an actual watch, but wanted some tech too. While I still wanted a watch, I decided to get myself the smallest, cheapest Fitbit so I too could utilize the app, and I am thrilled with this little guy. So these days I still wear my Gear Fit on my watch arm and the Flex 2 on my other wrist. It works for me and I am very happy. The thing I love about the Flex 2 is its size. It is so small! My one main problem with the Gear Fit was that it was just a bit too big to sleep with on, as it would cause my arm to really fall asleep badly, so I could never utilize the sleep function of the watch. Even the Alta my fiance has is too big for her (causes the same problem on her as my Samsung does with me) but this Flex 2 poses no such problem with me, so I have been really happy that I can now track my sleep. It has given me some serious insight into how I spend my sleeping hours.

Overall, I lover this thing! The app is superb, the Fitbit is tiny, water resistant, and holds a good charge. The band is nice too. The next smartwatch I get will be more aesthetically pleasing and less fitness based because I've got this little Flex 2 that tracks all the fitness type stuff I need.
6 people found this helpful
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S. Marcus
5.0 out of 5 stars Highly recommend for you swimmers!!! Of course for runners too!
Reviewed in the United States on October 15, 2016
Color: BlackVerified Purchase
Ok, I am a longtime Fitbit user and was hoping the Fitbit2 would be a quantum improvement on an otherwise great product. After using it for a few weeks I can say that it certainly is.
The core functions of the original Fitbit always served my running workout routine well. However I always wished I could use it in the pool. That said I was skeptical it would actually record my lap swim accurately. It worked great, better than hoped for. My first clue that this was a quantum improvement came after the first gym visit wearing the Fitbit2. It recognized that I was on a elliptical machine and recorded it promptly. For the swim, I set the pool length (finding how to do that was not easy though) and started in. I also set it to notify me when I passed my 45 minute first benchmark. I also used a watch and counter also to make things honest. At 45 minutes the band vibrated which I could feel in the water. After I found it had not only correctly timed the 1 hour swim, but had correctly calculated the distance and added to the Dashboard!! Wow, just what I needed!!
I noticed a few concerns, but nothing that have kept me from being impressed. All and all, so far HIGHLY recommend.
Pros:
1. Does all the original Fitbit did in a smaller more secure package
2. GREAT for swimming laps. No need to wear a separate swimming watch.
3. Update process was smooth
4. Better appearance and stronger clasp.

Cons:
1. Seems to last about 5 days between charges, old one was 7. That may change as I stabilize my usage pattern.
2. Not simple to program swim mode. Seems simple after you figure it out but not immediately intuitive.
3. The way the device inserts into the band requires bending the band. This concerns me that band breakage such as with the Fitbit1 may become a problem again.
77 people found this helpful
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Emily Osburn
4.0 out of 5 stars Good as a reminder and tracker, but data not to be taken as gospel.
Reviewed in the United States on June 2, 2018
Color: BlackVerified Purchase
This is a really neat product with a lot of potential, but needs some minor refinement. The waterproof aspect is huge, and a great plus. It's also cheap in comparison to the other Fitbit models. The app is useful and allows you to automatically track sleep and exercise, while manually tracking food and water intake, weight, and female cycles. The sleep tracking and silent alarm were my two primary wants out of this item. The sleep tracking works great, and let's me know how restless I am at night.
However, one of the biggest downsides is that it loses track of time rapidly if you don't constantly sync it - a silent alarm set for 6am may go off anytime between 5:30 and 6:30, which is incredibly frustrating. It's also cumbersome to set this alarm and there cannot be multiple. The pebble also requires location services to be on to sync, but this isn't necessarily a fault of Fitbit, but it is why mine isn't constantly syncing.
It also is potentially inaccurate. Despite me and my wife wearing a matching set of these on the same wrist, walks we take will measure significantly differently. When walking with someone with an Apple Watch (which uses GPS), a walk around town side by side resulted in a massive 2 mile claimed difference between my Fitbit and their watch.
All in all, it's a nice and simple reminder for healthier living, and the app is what's useful. But all in all I'm rather skeptical of it's measurement methods.
3 people found this helpful
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James Branson
5.0 out of 5 stars Cool gadget
Reviewed in the United States on April 14, 2024
Color: BlackVerified Purchase
Love it!
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Top reviews from other countries

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João Luiz Fontana de Figueiredo
4.0 out of 5 stars Excelente, porém...
Reviewed in Brazil on January 9, 2019
Color: BlackVerified Purchase
Produto excelente, bonito, leve e ótimo para o dia a dia... O único defeito é que não notifica mensagens de texto do WhatsApp!
One person found this helpful
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chainmailgoddess
5.0 out of 5 stars I for one welcome our new robotic overlords!
Reviewed in Canada on July 28, 2018
Color: BlackVerified Purchase
This little gizmo that will tell you to move when you're being lazy, and celebrates when you hit your step goal! It's simple, it doesn't have a watch because time is a silly wibbly wobbly ball of...stuff anyway, I like it. This is a lot of fun and has helped keep me from dying early from a sedentary lifestyle as a human battery powering the Matrix.
2 people found this helpful
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David V
5.0 out of 5 stars Buen monitor
Reviewed in Mexico on October 31, 2017
Color: BlackVerified Purchase
Me agrado bastante esta banda. Dudaba en adquirirla debido a que no tiene pantalla. Pero a favor tiene que es demasiado delgada y discreta y es a prueba de agua. La pantalla no la extranie ya que toda la informacion esta disponible en el celular mediante bluetooth.
7 people found this helpful
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Timothy Coyle
5.0 out of 5 stars Casual fitness tracker
Reviewed in Australia on December 10, 2023
Color: BlackVerified Purchase
Does what it says - just note no heart rate.
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２児のパパ
5.0 out of 5 stars 買って満足しています。
Reviewed in Japan on June 14, 2020
Color: BlackVerified Purchase
初期型のFitbit Flexを3回買い替えして使ってました。今回リチウムイオン電池が充電出来なくなったための買い替えです。電池は2年は持たない気がします。次の世代となるこのFitbit Flex2は海外パッケージとなっていましたが日本語訳も載ってました。Fitbitアプリは前の機種からそのまま移行出来て、前の世代より電池の持ちが良くなった点、小型化し目立たないように感じる点を気に入っています。
アプリのバージョンアップで不具合がある時がたまにあるので、基本的にアプリのバージョンアップはすぐせず、評価者の意見を聞いてから遅れてする、もしくはしないようにしています。私個人的には、買って満足しています。
2 people found this helpful
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