Able Planet NC210CG True Fidelity Foldable Noise Canceling Headphones, LINX Audio Technology, Black Compact and comfortable package with a folding design for convenient portability Patented LINX audio technology provides maximum clarity while reducing distortion, filtering unwanted sound and restricting electromagnetic interference. The result is a natural, immersive sound experience that brings out all of the detail in your music Adjustable, padded headband provides a snug fit for practically any head size Thick around-ear cushions provide lasting comfort and natural noise isolation Active noise canceling technology significantly reduces the impact of unwanted environmental noise and operates on a single AAA battery