In-ear headphones fit snugly and comfortably in your ear canal, and the adjustable, secure-fit earhooks offer lightweight comfort and stability Wireless connectivity eliminates the fuss of unruly cables, so you can keep your focus as you exercise, commute, or work Class 1 Bluetooth extends range and decreases dropouts Powerful, balanced sound boasts a dynamic range with noise isolation Volume and track controls on each earbud, voice capability, and Auto Play/Pause make it easy to control your music when you're on the move Apple H1 headphone chip enables "Hey Siri" voice control and improved connection speeds Reinforced design provides sweat and water resistance to survive even the toughest workouts Get up to 9 hours of listening time with one charge, or more than 24 hours with the included charging case Fast Fuel delivers 1.5 hours of playback with just a 5-minute charge when battery is low