Fitbit FB401BK

Flex Wireless Activity Sleep Black Wristband

  • Model: FB401BK
  • Sku: FB401BLK
  • In Stock
  • Limit 2 Per Household

Stores Near You...

  • Sync Stats Wirelessly And Automatically To Your Computer Over 150 Of The Lead Smartphones
  • Tracks Steps, Distance, Calories Burned And Active Minutes
  • LED Lights Show How Your Day Is Stacking Up Against Your Goal
  • Monitor How Long And Well You Sleep
SRP $99.99
Off SRP $30.11
Clearance Price $69.88
  • Manufacturer's Warranty 12 Months Parts
    12 Months Labor
    Carry In Service
 

Product Overview↑ Back to Top

Fitbit
Never stop moving with Fitbit FB401BK 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.
 

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Technical Specs ↑ Back to Top

Color Black

Dimensions

Unboxed
Height 0.4 in
Width 0.6 in
Weight 4.0 oz
Depth 8.2 in
Boxed
Height 0.4 in
Width 0.6 in
Weight 4.8 oz
Depth 8.2 in

Ratings & Reviews ↑ Back to Top

REVIEW SNAPSHOT®

by PowerReviews
FitbitFlex Wireless Activity + Sleep Wristband
 
3.4

(based on 13 reviews)

Ratings Distribution

  • 5 Stars

     

    (6)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (4)

  • 1 Stars

     

    (2)

44%

of respondents would recommend this to a friend.

Reviewed by 13 customers

Displaying reviews 1-10

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2.0

Tracks arm movement not steps

By Debriel

from Undisclosed

Comments about Fitbit Flex Wireless Activity + Sleep Wristband:

I found that this tracks only when I move my arm and not my feet. If you are pushing a buggy or holding on while walking on a treadmill it does not count your steps. That is the negative about all of the fitbits If you place it on your ankle it works great. It does track your sleep nicely.

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5.0

Great motivator

By Honeybear1

from Undisclosed

Comments about Fitbit Flex Wireless Activity + Sleep Wristband:

I have had mine since Christmas 2015, love it. I am not good with technology and this is so easy to use. I have lost it and got it back, wish it stayed on more securely. I have accidently worn it into the shower. I love being able to keep track of my sleep and steps!

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(2 of 2 customers found this review helpful)

 
2.0

Missing one thing.

By cheryl26

from Undisclosed

Comments about Fitbit Flex Wireless Activity + Sleep Wristband:

I wish it was water proof. My review is focused on the product.

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(2 of 2 customers found this review helpful)

 
1.0

Not Pleased

By mrmikem

from Undisclosed

Comments about Fitbit Flex Wireless Activity + Sleep Wristband:

There were no instructions with the fitbit and the online instruction are very confusing. I still have no idea how to use it, set it up or especially how it is supposed to monitor my sleep, which was the primary reason I bought it. I need detailed instructions on how to set it up and use it.

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(3 of 3 customers found this review helpful)

 
2.0

Won't Sync

By ddoriej

from Undisclosed

Comments about Fitbit Flex Wireless Activity + Sleep Wristband:

I bought the Flex on Feb. 13 and it worked fine for just over 2 weeks. I haven't been able to get it to sync for over a week now because it indicates a low battery, which is fully charged. It's going back to the store today. Not sure yet if I will exchange it for another one, try something else, or just give up.

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(2 of 4 customers found this review helpful)

 
5.0

great item

By kacjes05

from Undisclosed

Comments about Fitbit Flex Wireless Activity + Sleep Wristband:

I bought this for myself and I love it. It motivates me to keep moving and how I sleep. When I go to the doctor or the gym I can just show everyone how Im doing instead of telling them. Love it.

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(2 of 5 customers found this review helpful)

 
5.0

Very Helpful!

By Sapnak

from Undisclosed

Comments about Fitbit Flex Wireless Activity + Sleep Wristband:

I'm so glad i bought this, it motivated me to reach my fitness goals!

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(8 of 15 customers found this review helpful)

 
1.0

sad day

By misslavig

from Undisclosed

Comments about Fitbit Flex Wireless Activity + Sleep Wristband:

I was so exited to get this since my husband has been using one for a while. However it is not compatible with my surface and then its dead. It won't turn on we were directed to charge it reset it and set it up on my husbands PC and all for nothing, it still won't turn on. And as another reviewer has stated it is difficult to get the band on your wrist.

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(13 of 15 customers found this review helpful)

 
5.0

Love it!

By ReviewNickName

from Undisclosed

Comments about Fitbit Flex Wireless Activity + Sleep Wristband:

Great product! It should come with a guide though :( The taps are tricky to learn. Other than that, mine has a super battery life and is a great product. Also, the app is really easy to use. Wish it had more features for SELF challenge rather than "challenge a friend" but oh well. Just keep my goals to myself and challenge myself each day :)

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(9 of 11 customers found this review helpful)

 
2.0

Great Features, poor reliability

By rojo

from Undisclosed

Comments about Fitbit Flex Wireless Activity + Sleep Wristband:

Love the utility and especially like the fact that I can compete with friends and family around the planet. Big problem: I'm about to return my second one in 3 months. I'm quite tech savvy and have not abused this product what-so-ever. But here I am, trying to get in touch with fitbit again to send me a new one.

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Displaying reviews 1-10

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