Sonos Ace Active Noise Cancelling Over-Ear Headphones (White)Key Features Sound like youve never feltMeticulously engineered and tuned by the most discerning ears in the industry, Sonos Ace surrounds you in the highest fidelity audio for the deepest connection to sound. Tune out or in to your surroundingsWorld class Active Noise Cancellation (ANC) blocks external sounds for maximum immersion. Switch to Aware mode to hear whats going on around you. 30 hours of battery lifeListen or talk for up to 30 hours even