Amps HD in-ear headphones are designed to deliver incredible sound, style and technology.Ear Tips For Life: Losing ear tips is easy. Now there"s finally a solution. SOL Republic will send you ear tips for life. No questions asked. Powerful Sound You Can Feel: Featuring i6 Sound Engines, Amps HD are fully loaded with deeper bass, higher clarity and crisp vocals so you can feel the full power of your music. Listen In Comfort: Including four sizes of ear tips,you"re sure to get a comfortable fit and perfect seal for hours of music bliss. Secure Fit: Using StayFitTM design, Amps are angled to fit perfectly in your ear instead of falling out. Mic + Music Control: Control your calls and your music with the touch of a button. Our three-button remote lets you adjust the volume, skip music and answer/hang-up calls. The high clarity mic captures every word possible. Wide-mouth pocket case: Our pocket case makes it easy to transport your Amps HD Compatibility: The remote and mic are supported by iPod nano (4th generation or later), iPod classic (120GB/160GB), iPod touch (2nd generation or later), iPhone 3GS, iPhone 4, and iPad. The remote is supported by iPod shuffle (3rd generation and later). Audio is supported by all iPod models.