Four drivers deliver unsurpassed dynamic power and definition. Meticulous design with streamlined aluminum chamber ensures exceptional comfort and noise isolation. Expertly tuned by Grammy Winning sound engineer Luca Bignardi. Comfortable ergonomic design for a natural fit and extended use. Intelligent control technology lets you answer calls, skip tracks, and adjust volume. Deluxe accessories that include a travel case, 9 ear tips, ? inch adapter, airline adapter, and a matching shirt clip.