High-performance wireless earphonesUp to 15 hours of listening time 1Adjustable, secure-fit ear hooks for comfort and stabilityReinforced, sleek design for sweat & water resistance during tough workoutsIntegrated on-ear controls for music, phone calls, and voice capabilityPowerful, balanced sound with dynamic range and noise isolationClass 1 Bluetooth® for extended range and fewer dropoutsWith Fast Fuel, a 5-minute charge gives 1 hour of playback when battery is low 1Enhanced phone call performance for voice clarity