JBL Headphones app: with the JBL Headphones app, the EQ can be selected to match your own style. In addition, voice prompts inform when the battery is almost empty. Pause Free Music The JBL Tune Flex 2 earbuds provide 10 hours of battery life, plus an extra 30 hours with the charging case with the ANC on, or up to 12 hours plus 36 hours with ANC off.
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