Totally wireless high-performance earphones.Up to 6 hours of listening time (more than 24 hours with charging case). Reinforced design for sweat and water resistance during tough workouts. Volume & track controls on each earbud, voice capability, and auto Play/pause. Enhanced phone call performance and call handling from either earbud. Powerful, balanced sound with dynamic range and noise isolation. Earbuds connect independently via class 1 Bluetooth for extended range and fewer dropouts.