The Sennheiser Around-the-Ear Premium Collapsible Noise-Canceling Headphones with TalkThrough are premium headphones with Sennheiser’s exclusive NoiseGard 2.0 active noise-compensation system. It effectively reduces up to 90% of ambient noise. The extremely comfortable headphones offer audiophile-grade sound combined with a foldable construction for maximum enjoyment and convenient storage. The innovative new TalkThrough function allows the user to communicate with neighbors without taking the headphones off. Unwanted background noises such as the roar of the airplane engines are filtered out so only the neighbor’s voice is passed through the headphones at top quality. It takes only 1 AAA battery to power up to 16 hours of listening. It also functions as a passive headset when used without batteries so the audio always works.