The second generation black Studio Over-Ear Headphones from Beats by Dr. Dre are designed for repeating audio in addition to taking calls from your mobile devices. They feature Beats Adaptive Noise Cancelling innovation, which can be used while paying attention to music or by itself to decrease background noise from your commute or environment. Their noise cancelling and DSP are powered by the built-in rechargeable battery that offers as much as 20 hours of use per charge. The battery can be recharged via the included USB charging cable and USB power adapter. The headsets themselves have a foldable design for storage and transport in the included hardshell case.Product Highlights:-Integrated Rechargeable Battery -20 Hours of Playback Per Charge-Adaptive Noise Cancelling Technology-Remote Talk In-Line Remote & Mic-Foldable Design-Includes USB Charging Cable-Includes Hardshell Carrying