UA Project Rock True Wireless – Engineered by JBL


UA Project Rock True Wireless – Engineered by JBL True wireless built for the grind - Image

True wireless built for the grind

Compact and cable-free for zero distractions

UA Project Rock True Wireless – Engineered by JBL UA Storm waterproof, high-performance design - Image

UA Storm waterproof, high-performance design

IPX7 Sweat & Waterproof technology that works just as hard as you do.

UA Project Rock True Wireless – Engineered by JBL Bionic Hearing - Image

Bionic Hearing

With just one touch, Bionic Hearing allows you to hear your surroundings with two sound Technologies. With TalkThru Technology, music is lowered and speech is amplified for quick conversations between sets. AmbientAware delivers a more immersive music experience with increased ambient sound for safety outdoors

UA Project Rock True Wireless – Engineered by JBL JBL Charged Sound - Image

JBL Charged Sound

Bold sound tuned for sport with rich bass built for the grind.

UA Project Rock True Wireless – Engineered by JBL Up to 25 hours of total battery life - Image

Up to 25 hours of total battery life

Up to 5 hours of playtime + 20 additional hours (max) in rugged aluminum case for charging on-the-go.

UA Project Rock True Wireless – Engineered by JBL Bluetooth® wireless - Image

Bluetooth® wireless

Compact and cable free for zero distractions.

UA Project Rock True Wireless – Engineered by JBL Antibacterial Sport Flex Fit ear tips - Image

Antibacterial Sport Flex Fit ear tips

Winged ear tips that are easy to use for maximum security.

UA Project Rock True Wireless – Engineered by JBL Aluminum charging case - Image

Aluminum charging case

Sleek alumminum sliding design is built to endure, charging your headphones quickly and safely.

Specs & Downloads



Wireless freedom built for the grind

UA Project Rock True Wireless offers a truly cord-free experience built for the grind. UA Storm waterproof technology and Antibacterial Sport Flex Fit ear tips were crafted specifically for all-condition training while the JBL Charged Sound was boldly optimized and tuned with rich bass for motivation. Hear your surroundings with Bionic Hearing featuring TalkThru Technology for quick conversations with just one touch, and AmbientAware Technology to hear your surroundings for increased safety. With up to 25 hours battery life and a rugged aluminum charging case, these headphones truly break the limits.

General Specifications

Weight (g)
charging cable, ear fit tips
JBL 5.8mm dynamic drivers and four JBL microphones
Frequency response
20Hz - 22kHz
95 dB@ 1kHz/1mW
Maximum SPL
Microphone sensitivity
Charging case battery life
Up to 20 hours
Charging case charge time
2 hours from empty

Audio Specifications

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


Weight (g)
Weight (oz)

Control and Connection Specifications

Bluetooth profiles
A2DP v1.3, AVRCP v1.5, HFP v1.6
Bluetooth frequency
2.402GHz – 2.48GHz
Bluetooth transmitted modulation
Bluetooth transmitter power
Bluetooth version


Charging time (hours from empty)
Maximum play time (hours)
Maximum talk time (hours)


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

What's in The Box?

  • 1 x True Wireless Flash in-ear sport headphone
  • 1 x Protective sport charging case
  • 3 x Sizes of ear tips
  • 3 x Sizes of Freebit tips
  • 1 x Utility case
  • 1 x 12-Month MapMyFitness™ Premium membership
  • 1 x Brahma Bull Sticker
  • 1 x Quick start guide
  • 1 x Safety sheet
  • 1 x Warranty card

Documents & Downloads

Reviews and Q&A

Customer Reviews

Rated 2 out of 5 by from Half Dead My initial assessment on these ear buds was that they were exceptional. The fit is great, battery life is good and they function well in the gym. However, after about 3 months the talk-through function stopped working and the mic was no longer working. This didn’t bother me too much because I avoid calls and talking on the phone while working out. Fast forward to about 9 months and one of the ear buds has stopped working at all. It appears that it doesn’t charge anymore. I have cleaned the contacts on the charger and the ear bud and now change. Unfortunately, my warranty ran out about 45 days ago. Considering what these cost I had expected at least 2 years of service.
Date published: 2020-08-30
Rated 1 out of 5 by from Charging Issues x 2 I received my first set of these at New Years 2020. They worked for 2 months and then the left earbud stopped charging/would not hold any charge at all. After fighting with customer service for a month I eventually got a replacement. The replacement arrived and worked for a month until, you guessed it, the left earbud stopped charging. This is ridiculous that I'm starting yet another mission to get another replacement. I'd imagine the Rock would be embarressed if he knew he put his name to this! What makes it more frustrating is that they are in fact excellent when working!! Wish me luck for 3rd time lucky!
Date published: 2020-06-24
Rated 2 out of 5 by from Good for music and activity, phone call feature with microphone is terrible Good for listening to music during workouts. Style of the product is nice. For the money spent though, I am very dissapointed that no one can hear me on calls. The incoming call audio comes through fine but my voice isn't being picked up by the mic at all, even when holding the mic ear bud super close to my mouth. Hopefully support can offer some advice on this... I would rather you have cut out the phone reception feature entirely since it doesn't seem to work and knock $50 or so off the price. Satisfied with the product for listening to music coupled with strenuous physical activity but shouldn't have to disconnect to take phone calls, overpriced to not have stable functionality in that regard.
Date published: 2019-11-29
Rated 5 out of 5 by from Not a gimmick! The Best Wireless for Workouts! Six Month Quality Review: 1. High-quality sound - JBL! 2. Stays put - Amazing fit! 3. Waterproof- Sweatproof! 4. Under Armour + The Rock - Perfect Partnership! I am very happy with this product. I have used these headphones for every workout for the last six months. I continue to be amazed by the sound quality and durability of these buds! Wattage-wise, I "wised" up to the simple fact that I do not need high wattage channeling directly into my ear canal! These buds find the perfect balance to providing enough power output to drive through that next heavy set of bench presses without making your ears hurt! Great product, great product sponsor in Mr. Dwayne "The Rock" Johnson!
Date published: 2020-01-15
Rated 4 out of 5 by from Earbuds are great but the case is just ok. I bought these for my husband who’s job requires long hours of walking. So far the earbuds are fantastic they do exactly what they promised they would, they are comfortable up to a point. His ears do start to hurt after a while but that happens with all earbuds for him. My only problem is the carabiner attachment, after wearing the case on his belt loop for about 3 days the silicone piece snapped from the case. The product is still fully functional but I’m really disappointed with how quickly the case broke.
Date published: 2019-07-09
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Product Q&A

Are they fully submersible? Can you swim with them?

Asked by: Ptown
They are fully submersible, but swimming and listening to music with them won't work. Bluetooth cannot transmit through water, so as soon as the earbud goes under water, it will lose connectivity with your phone.
Answered by: KWIII
Date published: 2019-06-06

Volume Control

Is there a way to adjust the volume other than the device it&rsquo;s connected to?
Asked by: Hiloboy
No, there is no volume control on the earbuds
Answered by: StayFrosti
Date published: 2020-07-30

Can u use it for phone calls as well?

Also can u have one ear bud and have one charging? Does both of the headphone has a built in mic or one of them only?
Asked by: Streetmarine
No you cannot. Infact I bought them and can hear the person on the call but they cannot hear me at all. I&rsquo;ve to take the right earbud off and bring it close to my mouth for them to hear me which is ridiculous
Answered by: Usman
Date published: 2020-06-15

Is it ok to use while swimming, since it's waterproof?

Asked by: ljrferrer
A rating of IPX7 means that the product can be immersed in water for a maximum of 30 minutes at a depth between 15cm to 1m.
Answered by: Faken
Date published: 2019-05-30

Do they work independently of one another? Can I switch/talk through each earbud?

Asked by: Tsunade
Hello. I have the regular Under Armour version of these. The right one will work independently but the left one will not. To confirm this I called JBL directly and they put me thought to one of the product engineers. Not a deal breaker for me, but it would be awesome. Hope this helps.
Answered by: Higgsquans
Date published: 2019-06-01

Will these pause what you're listening to if you take an ear bud out and auto resume when you put it back in?

Asked by: ArdentBean
The UA True Wireless Flash Project Rock Edition can be paused, but does not have song recognition. If you turn the headphones off by putting them back into the charging case, you will not be able to resume the song you were once paused at.
Answered by: UAExpert
Date published: 2019-06-12

Can you used them in the sauna?

Asked by: DRECALDE
Per JBL's warning they should not be exposed to anything over 140 &deg;F (60&deg;C) due to the lithium batteries. So as long as you stay under that range you should be fine.
Answered by: Higgsquans
Date published: 2019-06-05

Do these have an integrated heart rate monitor?

Asked by: Keefer
To the best of my knowledge, there is no heart rate monitor with this device. UA does feature several health apps that give an approximation of what your rate is based upon your age, weight, etc... and the type of exercise you are doing.
Answered by: Redhawk04
Date published: 2020-09-28
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