In-ear headphones fit snugly in your ear canal Flexible, secure-fit earhooks for ultra stability and comfort Wireless connectivity eliminates the fuss of tangled cables, so you can keep your focus as you exercise, commute, or work Powered by the Apple H2 chip Built-in heart rate monitor for every exercise Class 1 Bluetooth extends range and decreases dropouts Sweat and water resistance to survive even the toughest workouts Features Active Noise Cancelling, Transparency mode and Adaptive EQ Up to 45 hours of battery life with wireless charging case (included)