An industry first. Housed within the custom shell, a quad armature speaker system uses an electrically and acoustically tuned three-way crossover to produce an unparalleled sound environment. The Ultimate Ears 11 Pro provides - 26dB of passive noise cancellation._x000D_
Tool for easy cleaning._x000D_
Engraved Carrying Casea_x000D_
Personally engraved black metallic carrying case that protects your Custom In-Ear Monitors.