The Beats Acoustic EngineTM makes your listening experience personal and real Beats' signature DSP software is designed to generate the emotional experience that some of the music industry's greatest rock, hip-hop, pop, electronic, and R&B producers want you to feel; his is how music would sound if the artist could play it back for you in person Silence the noise from your daily commute or the drama from your loud neighbors with dual-mode Adaptive Noise Canceling When you're listening to music, ANC automatically strikes the perfect blend between your music and the world outside If you only want to use the headphone to cancel external noise, the ANC only mode automatically increases the level of noise cancellation, to put the world on mute Dead batteries can kill your vibe; the Beats Studio2 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 To prevent wasting energy, the Automatic On/Off feature turns the headphone off when you unplug from a wired connection and with the Battery Fuel Gauge, you always know how much juice is left Forget specialized adapters; the Studio2 Wireless can be charged via micro USB almost anywhere