Under Armour® True Wireless Flash – Engineered by JBL®

Under Armour® True Wireless Flash – Engineered by JBL®

True wireless earphone for your every run, with JBL technology and sound

Sold from 2018 until now

Getting started with your Under Armour® True Wireless Flash – Engineered by JBL®

Getting started with your Under Armour® True Wireless Flash – Engineered by JBL®

Quick Start Guide

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Documents & Downloads

Product Specifications

Driver size (mm)
Driver sensitivity at 1kHz/1mW (dB)
Dynamic frequency response range (Hz)
Impedance (ohms)
Number of drivers per ear
Weight (g)
Weight (oz)
Bluetooth version
Bluetooth profiles
A2DP V1.3, AVRCP V1.5, HFP V1.6
Bluetooth frequency
2.402GHz - 2.48GHz
Bluetooth transmitted modulation
Bluetooth transmitter power
<9.5 dbm
Charging time (hours from empty)
Maximum music play time with ANC off (hours)
Maximum talk time (hours)
Maximum play time (hours)
Charging cable
Voice Assistant integration
Ambient Aware
Built-in Microphone
Google Assistant
Hands Free Call
JBL Charged Sound
Sweat Proof
True Wireless
Charging case
Rechargable battery
Controls on Ear Cups?

Wireless freedom to push yourself further

UA True Wireless Flash offers a truly cord-free experience to push yourself further. The UA waterproof technology and Sport Flex Fit ear tips were crafted specifically for all condition training while the JBL Charged Sound was boldly optimized and tuned for motivation. Hear your surroundings with Bionic Hearing featuring TalkThru Technology to quickly interact with your workout partner, and AmbientAware Technology to hear your surroundings for increased safety. With up to 25 hours battery life and a durable aluminum charging case, these headphones truly break the limits.

Cord-free design enables athletes to maximize each and every workout.
IPX7 Sweat & Waterproof, these buds promise to withstand your most rigorous workout and any elements thrown your way.
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. AmbientAware delivers a more immersive music experience while increasing ambient sounds, providing the safety of hearing your surroundings.
Bold sound tuned for sport with rich bass to crush your workout.
Battery life can last for up to 5-hours per charge, but no need for concern if you’re on-the-go. Simply recharge your earphones for up to another 20-hours max playtime with the water-resistant, aluminum charging case.
Easy-to-connect Bluetooth technology delivers a cable-free, zero-distraction performance.
Winged ear tips that are easy to use for maximum security.
Featuring a sleek, aluminum sliding design, the charging case has a fabric cord and ensures your headphones are recharged quickly and safely.

FAQs & How-Tos

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  • This headphone does not feature volume control. You must manually control volume from your device.
  • To activate TalkThru Technology, press the LEFT ear for a short press for 1 Second which allows you to clearly hear others for quick conversations without removing headphons. Music volume level should lower when TalkThru is engaged. Press again for 1 second to turn off Talk Thru.
  • To activate Ambient Aware DOUBLE CLICK the center button located on the LEFT ear. You should hear the music level drop. To resume to normal music level, DOUBLE CLICK the center button on LEFT ear again.
  • The UA Flash does not support AptX or AAC audio codecs
  • To take a phone call, press the center button of the RIGHT ear for 1 second. To hang up a call, press and hold the center button on the RIGHT ear for 1 second. To ignore a call, press and hold center button for 3 seconds until music resumes.
  • To charge the UA Flash, place inside charging case. While charging, both LEFT and RIGHT ear bud will display a sold red light. Once the headphones are fully charged. The red light will turn OFF. When the charging case is fully charged, the white LED's will light up accordingly: 0= 0% Dead 2-3 = 40%-50% 4=100% Full battery life
  • To pause/play music, press center button on RIGHT ear for 1 second. To skip tracks forward, DOUBLE CLICK the center button on RIGHT ear. Unfortunately, you cannot skip tracks backward.
  • To connect to a new device, begin with the headphones powered off and hold the center button on the RIGHT headphone for 5 seconds to enter pairing mode. You will hear the BT pairing audible chime as it searches for a different device. Make sure the device you are wanting to connect to is in range and BT is on. Once connected you will hear the audible Connected chime. Once Right ear is connected, press and hold the center button on LEFT ear for 3 seconds as it powers on and connects to the device followed by the same Connected audible chime.
  • To power on and pair the UA Flash, remove the ear tips 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 ear as it attempts to pair with your device. Make sure your device is in range and BT settings are ON. The JBL True Wireless Flash should pop up on your list of discoverable devices within 3-5 seconds, and connect. Once connected, you will see a slow blinking blue light below the UA logo on the RIGHT Ear. The RIGHT ear must be connected first in order to power on and connect the LEFT ear. To connect the LEFT ear, simply press and hold on the UA logo for 3-5 seconds until you hear the audible power on chime. (The left should automatically power on when you remove it from the case) Once powered on, it should connect to your device within a few seconds displaying a slow blinking blue LED light below the UA logo.
  • To reset, Long press the (Right) button for 2s when the earbuds in the case, the blue LED will flash once to indicate reset is done.
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