UA True Wireless Flash X - Engineered by JBL
4.0 (142)
Write a review
UA True Wireless Flash X - Engineered by JBL Truly Wireless for Sport - Image

Truly Wireless for Sport

Cable-free design enables athletes to maximize each and every workout.

UA True Wireless Flash X - Engineered by JBL UA Waterproof Technology - Image

UA Waterproof Technology

IP67 Sweat & Waterproof, these buds promise to withstand your most rigorous workout and any elements thrown your way.

UA True Wireless Flash X - Engineered by JBL JBL Charged Sound - Image

JBL Charged Sound

Bold sound tuned for sport with rich bass to crush your workout.


UA True Wireless Flash X - Engineered by JBL Bionic Hearing - Image

Bionic Hearing

Using unique JBL sound and mic technology, Bionic Hearing allows you to hear your surroundings with two sound Technologies – TalkThru & Ambient Aware. With TalkThru Technology, music is lowered and speech is amplified so you can easily chat with a workout partner between sets. Ambient Aware delivers a more immersive music experience while increasing ambient sounds, providing the safety of hearing your surroundings.

UA True Wireless Flash X - Engineered by JBL Up to 50 Hours of Total Battery Life - Image

Up to 50 Hours of Total Battery Life

Battery life can last for up to 10-hours per charge, but no need for concern if you’re on-the-go. Simply recharge your earphones for another 40-hours (max) playtime with the water-resistant, aluminum charging case. Type-C speed charging gets you fully charged earphones just in 2 hours.

UA True Wireless Flash X - Engineered by JBL Sport Flex Fit Ear Tips - Image

Sport Flex Fit Ear Tips

Comfortable fin style ear tips that are easy to use for maximum security.

UA True Wireless Flash X - Engineered by JBL Passive Noise Cancellation - Image

Passive Noise Cancellation

Eartip design provides a snug seal to limit background noise for ultimate focus.

UA True Wireless Flash X - Engineered by JBL Independent Earbuds - Image

Independent Earbuds

With Bluetooth 5.0, make a call or listen to music on either bud independently. No need to worry about switching or missing a connection.

UA True Wireless Flash X - Engineered by JBL Crystal Clear Calls with Dual Mics - Image

Crystal Clear Calls with Dual Mics

Optimized quality powered by Dual Beamforming mics, and wind-blocking technology.

UA True Wireless Flash X - Engineered by JBL Google Fast Pairing - Image

Google Fast Pairing

Hassle-free pairing with your device.* Android 6.0 or above supported devices

UA True Wireless Flash X - Engineered by JBL Aluminum Charging Case - Image

Aluminum Charging Case

Featuring a sleek, aluminum sliding design, the charging case has a fabric cord and ensures your headphones are recharged quickly and safely.

UA True Wireless Flash X - Engineered by JBL UA MapMyRun Premium Membership - Image

UA MapMyRun Premium Membership

12-Month Premium Membership included

Specs & Downloads



Wireless freedom to push yourself further

UA True Wireless Flash X offers a cable-free truly wireless experience to push athletes to perform their best. UA waterproof technology allows training in all conditions, and Sport Flex Fit ear tips provide a comfortable yet snug fit that provides Passive Noise Cancellation for superior focus. JBL Charged Sound was tuned to maximize motivation, and Bionic Hearing features TalkThru Technology to quickly interact with your workout partner, and Ambient Aware Technology to hear your surroundings for increased safety. With up to 50 hours of battery life and a durable aluminum charging case, these headphones help you break the limits.

General Specifications

Driver size (mm)
IP Code

Audio Specifications

Driver sensitivity at 1kHz/1mW (dB)
Dynamic frequency response range (Hz)
20 Hz – 22 kHz
Impedance (ohms)
Number of drivers per ear


Driver size
5.8 mm
117 g

Control and Connection Specifications

Bluetooth profiles
A2DP V1.3, AVRCP V1.6, HFP V1.7
Bluetooth frequency
2.4 GHz – 2.4835 GHz
Bluetooth transmitted modulation
Bluetooth transmitter power
0 - 8.5dbm
Bluetooth version


Charging time (hours from empty)
Maximum play time (hours)
Maximum talk time (hours)
Charging case battery life (max hours)


Ambient Aware
Built-in Microphone
Charging case
Hands Free Call
JBL Charged Sound
Rechargable battery
True Wireless

What's in The Box?

  • 1 x UA True Wireless Flash X Headphone
  • 1 x USB Type-C Cable
  • 3 x Ear Tips
  • 3 x Sport Flex Fit Ear Fins
  • 1 x Charging Case
  • 1 x 12-month UA MAPMYRUN Premium Membership
  • 1 x Quick start guide / Safety Sheet / Warranty Card / Warning Sheet
What's in The Box?

Documents & Downloads

Reviews and Q&A

Customer Reviews

Rated 2 out of 5 by from Poor Quality Headphones... 3 Times I bought these headphones about 6 months ago. After receiving not 1 but 3 defective pairs, I’m done with dealing with them. The first pair lost the ability to charge (common problem with these headphones), the second had a loose component that made the right earbud rattle, and the third pair had an incessant loud static ticking noise that was noticeable while listening to anything. I liked the fit of all three pairs but the quality is very poor. Upset that I wasted $120 dollars and countless hours talking to representatives and going through the return processes for subpar headphones.
Date published: 2020-09-06
Rated 4 out of 5 by from Very impressive features These headphones are fantastic. Huge number of features, amazing sound as is to be expected from JBL. The bass extends down very low, impressively but not overwhelmingly. They take some adjusting and swapping of ear pieces to get the right fit, but comes with more than enough extra pieces to get your fit right. The earpieces do not hurt my ears as some other TWS from other manufacturers have. The pass through and talk through functions work, but for whatever reason I don’t feel like I could hear my wife very well (not exactly 100% sure that she wasn’t whispering). Will test that again but that’s the only reason I went 4 instead of 5 stars.
Date published: 2020-08-20
Rated 4 out of 5 by from Best in class battery life Impressive lows and clean highs, you'll find yourself forgetting you have them in ear, the battery in the case last and lasts, I have used them 2 weeks without charging the case. Connecting Bluetooth is a breeze, they popped right up on my note 10 without having to do anything but put them in my ear. Pros: Good feel Great sound Fantastic battery life Super easy to connect to phone Don't fall out easily with correct ear pieces Cons: A little bit too large in diameter Sticks out a little too much Sound can change when chewing/moving jaw Overall these are a nice pair of headphones, with great sound, long battery life and water/sweatproof the only thing keeping them from 5 stars in the size, if they were smaller they would have it ticked all of the boxes.
Date published: 2020-08-29
Rated 4 out of 5 by from If It Ain't Broke, Don't Fix It So these basically look almost the same as their predecessor with some small updates that make a BIG difference. PROS - Bigger Battery doubling playing time up to 50 hours! - Independent earbuds, which means you can use either the L or R earbud independently thanks to the 5.0 Bluetooth technology. - Better microphones. Previous versions didn't do a great job filtering out background noise, but it seems like they fixed that. - USB charging port. I love that JBL is updating all their products to USB-C, you don't have to be carrying a micro usb now and you also get faster charging times! - The TalkThru feature is very useful but I like even more the new "ambient aware" feature because it doesn't lower the volume of whatever you are listening to but it activates the microphones so you can hear what's happening outside. I feel safer when running with this feature on. - Build Quality. These are build to last, especially the aluminium charging case. Amazing stuff by JBL. CONS - Sound Quality The sound quality is the only area where I think these headphones could improve. Don't get me wrong, the sound is good (so not really a con) but when I compare them to my JBL Reflect Flow I feel like the UA True Wireless Flash X sound a little flat, they lack some bass and crisper highs. Sound quality is very subjective, these might sound perfect for someone else. Like I said, they sound good but I feel like there is still room for improvement. - No app to control EQ or features
Date published: 2020-08-19
Rated 5 out of 5 by from Nice Sound - Good Bass UA True Wireless Flash X - Engineered by JBL Packaging: The Packaging for this product is exactly what I expected- JBL takes pride in packaging all products perfectly for a great first impression. Particularly for this product it is packaged Beautifully. Product: These ear buds are completely wireless. The over all look of then is nice. Experience: For these ear buds I wanted to really test them out for at least a week - they maintained long lasting battery life. They connect to my iPhone easily and quick. Sound: The sound is good - JBL continues to sell products with a nice crisp sound and with just the right amount of Bass. I recommend these ear buds it is a great product - especially for people who enjoy working out.
Date published: 2020-08-22
  • y_2022, m_12, d_5, h_21
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.34
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_80
  • loc_en_US, sid_uaflashx-, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_jbl
  • bvseo_sdk, dw_cartridge, 18.2.0, p_sdk_3.2.0
  • CLOUD, getReviews, 6ms
  • reviews, product

Product Q&A

Are these able to be used one at a time?

Asked by: Hades657
@Mario at customer service: why in the product features does it state that either earbud can be used independently to make calls and listen to music?
Answered by: stplive25
Date published: 2021-06-06

Do yo hear the thumping of our run when you are running with these ear buds?

Asked by: FitMoose
The thumping wouldn't be noticeable while you're listening to music with it.
Answered by: Jem at Customer Support
Date published: 2021-06-06

Do they work with one in the ear and one charging in the case?

Asked by: B4498
i have these wireless headphones and i'am able to leave one charging in the case and one in my ear. I normally wear mine in my right ear.
Answered by: coostan
Date published: 2021-11-19

Can you control the volume by pressing the buttons on the earbuds

Asked by: toni005
Control functions for music, calls & more are engaged by pressing the center buttons on each ear bud!
Answered by: UAExpert
Date published: 2020-11-24

Do they easily connect to iPhones?

Asked by: MikeVT3
I have and IPhone and once you connect them the first time they will automatically pair. Pretty nice 
Answered by: DrewH93
Date published: 2021-04-14

Not able to pair them to my IPod model MD720LL/A. It has latest software update and I can use it with other headsets, but I want to pair my new UA True Wireless Flash X to the IPod but it does not find them. What do you suggest?

Asked by: DrHeat
Please try to pair the UA Flash with a different device to check if the Bluetooth is working. To power on and pair the UA True Wireless Flash headphones, remove the earbuds from the charging case. If this is your first time using the headphones, they will automatically go into pairing mode. You will see the blue and red LED light flash on the RIGHT earbud as it attempts to pair with your device. If you need more help, kindly reach out to our Customer Support so we could try other steps.
Answered by: Chastine
Date published: 2021-06-06

Can you skip tracks with the earphone or do I have to use the device source for that?

Asked by: yankeefan38
Yes, you can skip tracks using the earphones, to do this you'll have to click on the button on the right bud two times. Check out more information in our Quick Start Guide here:
Answered by: Chastine
Date published: 2021-06-06

Whats the difference between these and the reflect flow?

Asked by: Bo Ba
The UA True Wireless Flash X is using a Type C USB cable and can work with only the right or left earbuds.
Answered by: Jem at Customer Support
Date published: 2021-06-06
  • y_2022, m_12, d_5, h_21CST
  • bvseo_bulk, prod_bvqa, vn_bulk_3.0.34
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_46
  • loc_en_US, sid_uaflashx-, prod, sort_[SortEntry(order=NUM_ANSWERS, direction=DESCENDING)]
  • clientName_jbl
  • bvseo_sdk, dw_cartridge, 18.2.0, p_sdk_3.2.0
  • CLOUD, getContent, 94ms
  • questions, product


Register your JBL product

Do you own this product? Register it here in case you need to claim warranty

Register Now

Can't find what you're looking for?

Are you looking for product support, documentation, how-tos or older products?

JBL Support