Amps 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 i4 Sound Engines, Amps are fully loaded with deep bass and high clarity 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. 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.I4 Sound Engines deliver deep bass and high clarity Three-button remote and ClearTalkTM microphone 90° angle plug takes the stress off your headphone jack