Open Box. Otherwise unused.Sennheiser IE 100 Pro In-Ear Headphones, ClearPrecise monitoring sound for live stages, mixing, producing or simply on the roadThe IE 100 PRO helps users discover the power of dynamic in-ear monitors on stage. Available in black, clear and red, users now have the option to go wireless with the IE PRO BT Connector. Improve the way you perform on stage and enrich private listening pleasure by enhancing the way you hear - wired or wireless, its your choice.The IE 100 PRO utilises the same robust connector developed for IE 400 PRO and IE 500 PRO. Due to the common connector, the new IE PRO BT Connector will be compatible with the IE 100 PRO, IE 400 PRO and IE 500 PRO. Unfortunately, it will not be compatible with the IE 40 PRO, which uses a different connector format.Key FeaturesInnovative, dynamic 10mm broadband transducer for warm, high-resolution soundReduces acoustic stress through precise, dissonance-free reproduction even at maximum sound levelsGood fit an