Built with proprietary driver technology, Beats by Dr. Dre BeatsPRO Headphones are perfect for pro-calibre recording, mixing andhigh-quality playback. With no noise-cancellation circuitry, theydeliver clean sound and rich bass. These over-the-ear headphonesfeature high-density, soft, plush earcups to offer a comfortablefit, while blocking out external noise. Simply rotate the earcupsbackward when you want to know what