Lightweight, on-ear designFor comfort during extended listening sessions. Soft earcups and an ergonomic bellow help ensure a custom fit.ANC (Adaptive Noise Cancellation)Automatically adjusts audio for the optimal blend of music and outside sound. ANC-only mode allows you to increase the level of noise cancellation.Bluetooth technologyEnables wireless operation with up to a 30&＃39; range.Beats Acoustic EngineProvides precision sound. DSP software helps generate the experience of live music through your headphones.Rechargeable batteryOffers up to 12 hours of wireless use and up to 20 hours when plugged into your audio device. A battery fuel gauge keeps you apprised of the power level.