JBL and Under Armour bill their new True Wireless Flash ($170) as totally wireless sports earphones “designed for runners by runners.” They’re technically the first truly wireless earphones from the duo and as far as truly wireless sports earphones go, they’re quite good, although some of their allure is tempered by a rather large charging case that’s probably three times the size of Apple’s AirPods’ charging case.
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https://www.cnet.com/reviews/ua-true-wireless-flash-engineered-by-jbl-review/