In-ear headphones fit snugly in your ear canalFlexible, secure-fit earhooks for ultra stability and comfortWireless connectivity eliminates the fuss of tangled cables, so you can keep your focus as you exercise, commute, or workPowered by the Apple H2 chipBuilt-in heart rate monitor for every exerciseClass 1 Bluetooth extends range and decreases dropoutsSweat and water resistance to survive even the toughest workoutsFeatures Active Noise Cancelling, Transparency mode and Adaptive EQUp to 45 hours of battery life with wireless charging case (included)