SUPERIOR ISOLATION - Reduce distracting background noise by up to 90% while offering superior soundnCOMFORTABLE AND FUNCTIONAL - Engineered to create a comfortable listening environment in areas with high ambient noisenREPLACE THAT FREE HEADSET - Feature a miniature microphone in each earpiece that picks up ambient noisenACTIVE NOISE REDUCTION - Electronics in control box create a noise-cancelling wave that is 180 out of phase with ambient noise-wave acts as noise erasernINCLUDES - Audio-Technica ATH-ANC23 Earphones, Airline plug adapter, 1 pair comply foam tips, 3 sets earpiece rubber tips (S/M/L), blucoil extender and earphone casen