Westone UM3X / 3X - True Triple Armature Drivers In-ear Monitor Professional ... Hand made in the U.S.A Uses 1 bass, 1 mid-range and 1 high frequency driver for the most dynamic sound reproduction in a universal fit in-ear monitor. Westone EPIC Cable - Ultra supple braided design insures comfort and resists tangles - Over-the-ear cable design offers superior in-ear comfort and isolation from mechanical cable noise Westone True-Fit Technology - 50 years experience with in-ear applications has yield optimum ergonomics and fit - True-Fit sound port delivers maximum comfort and in-ear coupling for dynamic transfer of sound. Robust bifurcation w/slide adjustment keeps cord in place during activity