These Earphones create an exceptional Music listening experience. The highest quality full range speakers allow Full Range Stereo Sound with deep Base Tones. The Earphones are compact, comfortable and lightweight for long-time use, and come with soft silicon earpieces in three sizes: small, medium and large. Works with iPod, MP3 Players, Home Entertainment Systems, DVD Players, personal computers and other devices with a 3.5 mm connector. The noise cancelling function was designed to block out external sound in high noise racing environments.