The ATH-CLR100iS SonicFuel® in-ear headphones give you great sounding audio with a travel-friendly design that includes an in-line mic and control button. The 8.5 mm drivers provide crystal clear sound reproduction with marvelous depth and detail. Plus, with Audio-Technica's ear-fit design and three sizes (S/M/L) of eartips to choose from, you'll enjoy long-lasting comfort and outstanding sound isolation. The cord features an in-line mic and control that lets you answer calls and handle playback (play, pause, fast-forward, reverse, next/previous track) of music and video on smartphones and other portable devices, including iOS devices.