Sennheiser MM55i Upgrade version of MM30i, MM50i. Pull line up create ( Dynamic with Detail sound) Ergonomic Design of Circle . this canal tpye earphone has gloss black with white color and Ultra lightweight ( 10g). Smart Remote & Mic - logo button ( call, play, stop function and Succession two touch is Random play) , You can volume control via +/- button) it is great to block outside noise function. and you can listen clear sound with stereo sound. Call button & mic - you can easy control call received, Music stop/play/random play etc.. would you like to listening something new music world?