With a noise-canceling design, these Sony over-the-ear headphones prevent unwanted outside noises from interfering with your listening experience. The Supra-Aural technology and 30mm drivers provide dynamic, clear tones. The active noise-canceling circuit can be turned on and off with an earcup-mounted switch and utilizes a single AAA battery to help reduce ambient noise by up to 95% or 13 dB. The noise canceling circuit can operate for up to 80 hours when using an LR03 alkaline battery and up to 40 hours when using an R03 manganese battery. The headphones will continue to operate passively when the battery is drained without active noise cancellation. For improved portability, the earcups can swivel flat and fold up into a more compact form factor. A flat Y-type cable design helps prevent tangles and terminates in a gold-plated L-shaped stereo mini plug. What's Included: Sony Noise-Canceling Over-the-Ear Headphones, R03 AAA battery, In-flight plug adapter (single/dual), Owner's manual