Sennheiser MM30i Headphones Connectivity Technology: Wired Smart in-line remote control with microphone change volume, skip tracks, answer or end calls and active Voice Control,from a sleek built-in unit Effective noise isolation: ear-canal design for effective passive attenuation of ambient noise Comfortable custom fit: three sizes of ear sleeves (S/M/L) supplied Made for the latest generations of iPod, iPhone and iPad Change the volume, skip tracks, answer or end calls and active Voice Control, all from a sleek built-in unit