The Wi Micro-In-Ear Personal Reference Monitors features a refined and perfected proprietary In-Ear-Canal micro driver design, engineered to deliver the highest sound quality directly and beautifully into the ear canal where it belongs. And of course, the sound that made Wi Digital Systems famous - brilliant instrumental sounds and vocals with crystal clear high notes, defined midrange, and rich, powerful low end for an excellent sound experience that will satisfy the most discerning professionals and audiophiles alike.