Westone UM3X is the newest ear canal earphones specially designed for musicians for stage monitoring. This is the highest-end triple driver with universal fit musicians" monitors, designed to offer the performing musician a well-balanced monitor no matter what instrument you play. The new UM3X uses the latest in balanced armature technology, with a true three-way crossover configuration that delivers incredible smooth response without accentuating any particular band of frequencies. Unlike the Westone 3 which was designed for playback, the UM3X was built from the ground up for professional (and amateurs) musicians that want and need the very best monitors for their performances. The UM3X is a universal fit ear canal headphone and because of that they do not require a visit to the audiologist. Each unit includes four pair of Comply© foam tips in small and standard size, a zippered carrying pouch and user guide and the UM3X comes with a durable 50" stereo "Y" cord with a 3.5mm stereo jack.