The super.fi 4 uses the same speaker technology and sound signature that is used in our professional monitors. The noise isolating design reduces ambient interference and enhances quality of sound. The custom tuned balanced armature/speaker is enclosed in durable and lightweight aluminum housing. The super.fi 4 features two wearing styles, cable down for casual listening and over the ear while exercising. Accessories include a pocket ready hard carrying case, comfortable silicone fit tips with small, medium, large and dual flange fitting options and an airline attenuator for hearing protection when using an unstable sound source.