When you listen with Altec Lansing, sound comes first. The Altec Lansing Comfort Q ANC Headphones feature active noise cancelling technology that let you focus more on the music and movies by reducing what you don't want to hear. Prefer to hear the outside world? Simply push the ANC button and you'll have Bluetooth headphones that still provide ultra-comfort and superior sound. With up to 26 hours of continuous audio on a single charge, there's enough life in these headphones to travel the world. The lightweight materials and soft ear cushions make these headphones comfortable to wear, and a foldable design makes it convenient for you to carry your headphones anywhere for anytime you want music.