Beats Studio Wireless Over-Ear Headphone - Gold-(Refurbished) The New Beats Studio Wireless comes with a built-in rechargeable battery that lasts 12 hours when using wirelessly and 20 hours when you do decide to plug in. With the Battery Fuel Gauge, you always know how much juice is left. Forget specialized adapters; the New Studio can be charged via micro USB almost anywhere The Bluetooth stays connected up to 30 feet so you can feel free to roam and keep the music going. Take calls, skip songs, and change the volume right from the headphone. Headphone has Adaptive Noise Cancelation, a rechargeable battery, and re-engineered sound, just with no wires. The Bluetooth connection lets you enjoy your music wirelessly for up to 12 hours or up to 20 hours when plugged into your audio device Funcin de cancelacin de ruido adaptativa Dual se establece la mezcla perfecta entre su msica y el mundo exterior. automticamente si slo quiere usar los auriculares para cancelar el ruido exterior, el modo Anc slo aumenta automticamente el nivel de cancelacin de ruido, para poner el mundo en silencio