The JBL Endurance Zone earbuds deliver dynamic sound all day comfort and a rugged sport ready design built to keep up with intense workouts. Featuring JBL OpenSound technology they provide rich immersive audio while keeping your ears aware of your surroundings with minimal sound leakage. A secure flexible earhook ensures a stable fit during any activity while the durable construction withstands sweat water and dust. With long lasting battery life customizable controls and seamless device connectivity these earbuds are designed to power every training session.