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With FlipHook™, designed to provide a customizable, secure fit as well as Bluetooth wireless connectivity, an IPX5 sweatproof rating and a long lasting 6-hour (max) battery life.Never put your run on hold.. The Endurance RUNBT will raise your heart rate with powerful JBL sound.

. With FlipHook™, designed to provide a customizable, secure fit as well as Bluetooth wireless connectivity, an IPX5 sweatproof rating and a long lasting 6-hour (max) battery life. The Endurance RUNBT will raise your heart rate with powerful JBL sound.Never put your run on hold.