UA Sport Wireless Flex – Engineered by JBL


Wireless neckband headphones with all-day comfort and secure fit and safety for sport

$129.95129.95 each
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Made to Move in Every Way You Do.

UA Sport Wireless Flex headphones deliver secure fit for sports and all-day comfort. Flex zones adjust to find the perfect fit no matter the activity. UA Sport Wireless Flex headphones drive your workouts thanks to their big, powerful JBL Charged Sound. And Bluetooth® wireless enables easy, cord-free connection. UA Flex headphones are sweat resistant with advanced nano coating. Stay safe after dark with the new RunSafe™ LED. A long-lasting 11-hour battery features Speed Charge to deliver an hour of playback on just five minutes’ charge. Control music, volume, calls, mute and unmute the mic when you’re in a call, and even activate Siri® or Google Now™ with a long press.


General Specifications

Headphone cable length (m) 1.0
Headphone cable length (ft) 3.3
Weight (g) 21.0
Weight (oz) 0.74
Ear tip material Silicon
Bluetooth version 4.1
Headphone cable length (cm) 100.0

Audio Specifications

Driver size (mm) 8.6
Number of drivers per ear 1.0

Control and Connection Specifications

Bluetooth profiles HFP v1.6, HSP v1.2, A2DP v1.2, AVRCP v1.5
Bluetooth transmitter power <4 dbm
Bluetooth frequency 2.402GHz-2.48GHz
Bluetooth transmitted modulation GFSK,π/4DQPSK, 8DPSK


Dynamic frequency response range (Hz) 10Hz-22kHz
Battery Type Lithium-ion polymer (3.7V, 2*100mAh)
Charging time (hours from empty) 2.0
Speed Charging time (hours) 2.0
Talk time (hours) 11+
Maximum music play time with ANC off (hours) 11+
Play time (hours) 11+


Rechargable battery Yes
4-Button Remote/ Mic Yes
In-ear neckband Yes
Speed charge Yes
JBL Charged Sound Yes
Sweat Proof Yes
Wireless Yes
Hands Free Call Yes
RunSafe LED Yes
Siri/ Google Now Yes
Flex Zone Yes
Click here for a complete list of all specs for this product

Spec Sheet (EN)

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UA Sport Wireless Flex – Engineered by JBL is rated 4.0 out of 5 by 41.
Rated 5 out of 5 by from The best I've ever owned The sound quality is excellent. I work in a loud environment and all other headphones I've owned were hard to hear even in max volume. I can keep these at halfway and hear perfectly!
Date published: 2018-11-29
Rated 5 out of 5 by from Excellent They are very good they comfortable the music sound good very bass heavy with good highs the mic good excellent when talking on the phone today my first day using them at work I work 11 hours days I turn them one at 3am it’s now 8am and the battery life at 70% so far
Date published: 2018-03-22
Rated 5 out of 5 by from Great sound and volume! I received my Under Armour JBL Sport Wireless Flex Headphones the other day and I've got to say I'm impressed! They're lightweight, easy to use and the sound quality is excellent. I've found other headphones to be lacking in the sound dept., requiring that I have to keep them in the max volume position - but I was surprised that these headphones allowed me to listen to my workout music at the halfway mark! This is a luxury I've never before experienced.
Date published: 2018-03-16
Rated 5 out of 5 by from Headphones for daily wear AND for your workout I normally listen to podcasts and music while running. While I have owned bluetooth headphones before, they rarely last long enough to get me through a long run. This makes them quite convenient for my weekday runs, but always forced me to use wired headphones for those long weekend workouts. I was a bit skeptical when I read the promise of a 12 hour battery life on the UA Sport Wireless Flex headphones and I am very grateful to be given the opportunity to review them. The headphones feel well built and have a satin texture on the neck piece. This textured finish helps while working out, as it stops them from slipping around on your neck. The ear-buds are magnetic and you can join them together to keep them from flopping about when not in use. Great touch. They are slightly flexible and can be molded around your neck easily. I honestly forget that I’m wearing then during the day. The buttons are easy to find with raised textured icons for play, pausing, plus and minus for the volume. They are pretty intuitive and you can easily get going without reading the manual. The only thing that you’ll need to read to figure out is how to turn on my favorite feature on them… the flashing LED light on the back of the neck piece. This is a seriously bright light, which helps for visibility when running at night. Not blindingly bright, but plenty to keep you from being invisible. Great design overall. As far as the charging and battery life… I can generally charge them fully in about 30 minutes and I have yet to kill the battery. I use them all day during work and go straight from there into a workout without any issues. I seriously think that they would outlast my phone and I have no reason to doubt the claimed 12 hours. The only thing I would add would be an indicator of the remaining battery life. Who knows, maybe the bluetoot light changes colors when the battery is close to dying, but again I haven’t even been close to killing the battery to know. As a whole, these are seriously brilliant headphones, with the great sound that you can always expect from JBL products. These would be a great choice for anyone wanting sturdy headphones that will survive a workout and don’t look out of place for daily use. Great product overall.
Date published: 2018-02-04
Rated 5 out of 5 by from Unique Features Had these headphones for about 3 weeks! Great headphones overall! They stay in ear, very comfortable to run and don’t move around much when you run! Love the quick charge for when on the go, also the LED light gives peace of mind, and also a very unique and cool design! Sound is phenomenal loud and clear , just make sure you have the right earbuds to get the best out of them
Date published: 2018-01-30
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After non-use they shut off to save the battery, which is normal. But why does it disconnect the Bluetooth so I can&rsquo;t answer the phone with the headset. Is this normal?&nbsp;

Asked by: Mrsdeltoro
We would like to work with you directly and get more information to help you with your issue. Please submit a case request at https://www.jbl.com/support-contact.html and the Customer Service Team will be more than happy to assist you.
Answered by: Mario at Customer service
Date published: 2018-09-20

How much the headphones weigh???

Asked by: John124
This product weighs 318 grams.
Answered by: Dan E
Date published: 2018-07-08

just how waterproof is this? like, take a shower waterproof, run in the rain waterproof, or just really sweaty waterproogf

Asked by: Legio Patris
The UA Sport Wireless Flex has an IPX5+ rating which makes it resistant to sweat and moisture.
Answered by: Mario at Customer service
Date published: 2018-11-20

Is it normal for the red light to go off after a few minutes while it's plugged in to charge? How do I know how much charge it has?

Asked by: Kylesleeps
The UA Sport Wireless Flex headphones has an LED indicator near the volume control buttons, where it would start blinking red once the battery charge goes low. There is no way of knowing the exact charge of the headphones, but if you start charging your unit, the same LED indicator with show a solid red light, and will go off once the battery has been fully charged.
Answered by: Mario at Customer service
Date published: 2018-08-28

Does it have caller name announcement feature? If not please suggest product with the same feature. Thanks.

Asked by: Tush
Thank you for your question. The JBL UA Flex does not have caller name announcement, but you can manually activate Siri and speak into the microphone and have her call the contacts in your phone. If you require further assistance,please submit a case request at www.jbl.com/support-contact.html and the Customer Service team will be more than happy to further assist you.
Answered by: Mario at Customer service
Date published: 2018-02-12

What are the three options of the LED lights? Different color? Flashing? What is it?

Asked by: Eclipse
Hi! The UA Sport Wireless Flex has a&nbsp;RunSafe mode.&nbsp;It is an LED indicator to keep you safe if you are walking or running outside after dark. When you press the microphone button (located on the LEFT arm) to enable the RunSafe mode feature. The first mode blinks continually. When you press the microphone again, the second mode is initiated which features 2 blinks on followed by 2 seconds without. Pressing the microphone again is the third mode which is 3 blinks on followed by 3 seconds without.
Answered by: Nick F
Date published: 2018-03-30

Could I know the exact size of headphone (mm) and power consumption?

Asked by: Kenneth_Choi
This information can be seen in the products specs.
Answered by: Karl Vincent
Date published: 2018-06-06

Is there a way to reset the headphones if they won't turn on and they are fully charged? Mine had stopped working and I've only had them for about a week and a half and I would really like to continue to use them.

Asked by: SparkleMommy82
We would like to work with you directly to help you with your issue. Please submit a case request at https://www.jbl.com/support-contact.html and the Customer Service Team will be more than happy to assist you.
Answered by: Mario at Customer service
Date published: 2018-11-15
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