ERGONOMIC TECHNOLOGY: 60 years of experience designing products for the ear has resulted in a universal-fit earpiece that is compact, low-profile, lightweight, and extremely comfortable. Our proprietary eartips enhance the performance of the Pro X10 by ensuring a great fit and seal, right out of the box. BALANCED-ARMATURE DRIVER: Westone Audio\'s proprietary balanced-armature drivers provide enhanced sonic detail and frequency range that extends well beyond other in-ear solutions. LINUM BAX T2 DETACHABLE CABLE: High-strength, ultra-low resistance tensile wire design with aramid fiber, with the most advanced MMCX connector available in the industry. PRECISE ACOUSTIC SYMMETRY - Left and right earpiece responses are matched to an extraordinarily tight +/- 2dB tolerance. This extends well beyond typical in-ear solutions. IDEAL FOR - On- Stage Monitoring, Vocalist, Guitar Players, Keyboard Players, Sound Engineers