The ATH-CLR100iS Sonic Fuel 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 ear tips 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