UM Pro 30 features three, proprietary balanced-armature drivers with a 3-way passive crossover, each driver was developed to increase sonic detail and clarity in a specific part of the frequency range. Designed for performing musicians, the UM Pro 30 has a soundstage that features powerful lows, articulate mid-range, and sparkling crystal-clear highs. With the performance, power, and output for any stage, from a small venue, to the world’s largest arenas, the incredible sound of Westone UM Pro 30 will meet the demands of the most discerning musician and music lover alike. The Westone UM Pro 30 incorporates all the innovations and expertise that Westone has developed in almost 60 years of designing and manufacturing products for the human ear. The compact, low-profile, ergonomic design is comfortable, and can be worn for hours and hours. . Westone’s proprietary silicone and comfort foam ear-tips are provided in 5 different sizes and enhance the performance of our In-Ear Musicians’ Monitors by ensuring a superb fit and by provide superior noise isolation. Ambient sound levels are reduced an average of 25 dB, which makes UM Pro 30 ideal for use onstage or in other noisy environments.