The Premium personal audio designed to complement the X1 family of systems. These Dual Driver headphones deliver clarity and bass creating a rich, emotional audio experience with your X1. Of-course these headphones add a fashionable touch to the X1- great sound/ amazing styling. Dual driver balanced armature driver delivers crystal clarity for high range sound. Dynamic driver provides rich bass in ear fit with multiple sized ear pieces in-line mic and answer/hang-up control fits 3.5mm with your notebook, workstation, tablet or smart phone.