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Dwayne "The Rock" Johnson, JBL and Under Armour introduce noise-canceling sports headphones with up to 45 hours of battery life | gagadget.com
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Amazon.com: Under Armour True Wireless Flash X– Engineered by JBL® - True Wireless bluetooth earbuds, waterproof headphones, microphone, Bionic hearing, up to 25 hours battery (Black) : Electronics
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