Totally wireless high-performance earphones. Up to 9 hours of listening time (more than 24 hours with charging case). Adjustable, secure-fit ear hooks for lightweight comfort and stability. Reinforced design for sweat & water resistance during tough workouts or running. Volume & track controls on each earbud, microphones with voice capability, and auto play/pause. Features the Apple H1 Headphone Chip and Class 1 Bluetooth for extended range and fewer dropouts. Compatible with iOS and Android. Enhanced phone call performance and call handling from either earbud. With fast Fuel, a 5-minute charge gives 1.5 hours of playback when battery is low.