Enjoy peace and quiet anywhere with our compact noise cancelling headphones . Using built-in microphones and advanced circuitry, our noise cancelling headphones create an acoustical mirror image of outside noises effectively cancelling them out. The result You hear music and movies with greater clarity and detail. Cancels up to 90% of outside noise. The advanced circuitry in our noise cancelling headphones actively cancels out outside noise like airplane engines and air conditioners for a more peaceful environment at home, at the office and on the go. What s more, the controls are located in the headset no dangling cords. Lets you hear every detail of your music. Our noise cancelling headphones also provide enhanced sound for music and movie soundtracks. Just attach the included cable with volume control to your laptop or MP3 player and enjoy! Also includes slim travel case, dual-pin airplane adapter and T-splitter for sharing. Uses 1 AAA battery (not included) for up to 100 hours of active noise cancellation. Tune out the noise and tune in great sound with Noise Cancelling Headphones from Brookstone.