Sennheiser HD228 Closed Back Headphone Optimized for iPod/iPhone/MP3/and Music Players (Discontinued by Manufacturer) Powerful neodymium magnets fo Closed supraaural design blocks out outside noise, creates a controlled envoirment for better sound Individually adjustable earcups with extra soft ear pads for secure fit. Optimised for iPod, iPhone, MP3 and CD players