Adjustable, secure-fit earhooks for lightweight comfort and stability Reinforced design for sweat & water resistance during tough workouts Volume & track controls on each earbud, voice capability, and Auto Play/Pause Powerful, balanced sound with dynamic range and noise isolation Earbuds connect independently via Class 1 Bluetooth for extended range and fewer dropouts With Fast Fuel, a 5-minute charge gives 1.5 hours of playback when battery is low