Tune Flex耳塞的最大操作温度是多少? 最高运行温度：45°C Have a follow-up question? Answers from the official manual.Common questionsHow do I pair the JBL Tune Flex to a new Bluetooth device?How do I factory reset the JBL Tune Flex earbuds?How long does the battery last on the JBL Tune Flex?How long does it take to fully charge the JBL Tune Flex?