It delivers a premium listening experience with Pure Adaptive Noise Cancelling (Pure ANC) to actively block external noise, and real-time audio calibration to preserve clarity, range and emotion. It continuously pinpoints external sounds to block while automatically responding to individual fit in real-time, optimizing sound output to preserve a premium listening experience the way artists intended. Up to 22 hours of battery life enables fully-featured all-day wireless playback. Apple W1 chip for Class 1 Wireless Bluetooth connectivity and battery efficiency. 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. Take calls, control music and activate Siri with multifunction on-ear controls.