Pure Adaptive Noise Cancelling (Pure ANC) actively blocks external noise Up to 22 hours of battery life enables fully-featured all-day wireless playback Real-time audio calibration preserves a premium listening experience,Soft over-ear cushions for extended comfort and added noise isolation Apple W1 chip for Class 1 Wireless Bluetooth® connectivity and battery efficiency, Take calls, control music and activate Siri with multifunction on-ear controls With Fast Fuel, a 10-minute charge gives 3 hours of play when battery is low, Pure ANC-off for low power mode provides up to 40 hours of battery life