When choosing a stereo headphone, comfort is only one criteria to determine what suits you. Two prime factors are sound quality and pureness. With a maximum SPL rating of 120dB and 35 to m42dB programmable noise isolation you"re getting more music to your ears and virtually no ambient noise. That"s what the Etymotic H3 delivers. It extends out further by offering an inline remote microphone and iPhone control for top class convenience for mobile use. Listen to music, get a call, then listen to music again. Then the H3 focuses on ergonomic comforts. ACCU-Fit features provide best-in-class fit and comfort, with four noise-isolating eartips included and a small form factor for easy insertion into ears of all sizes. The remote and mic are supported only by iPod nano (4th, 5th and 6th generation), iPod classic (120GB, 160GB only), iPod touch (2nd, 3rd and 4th generation), iPhone 3GS, iPhone 4, and iPad. The remote is supported by iPod shuffle (3rd and 4th generation). Audio is supported by all iPod models. Requires latest iPod software.