In sleek black, to go with some of today's newest MP3 and other audio players. The cutting-edge industrial design of the E4c is a breakthrough in sound isolating earphone technology. Ideal for the business traveler and on-the-go audiophile, the High-Definition Driver with Tuned Port Technology delivers brilliant highs and extended bass that enhance your listening experience with your portable MP3, DVD, and CD players as well as all other audio sources. The E4c's in ear design works like an earplug to block background noise naturally. This enables you to listen comfortably at lower volumes-even in loud environments. And unlike bulky headphones utilizing active noise cancellation technology, no artifacts are introduced into your listening experience. Sound isolating earphones are also much smaller and don't require batteries. E4c Sound Isolating Earphones feature High-Definition drivers with Tuned Port Technology for incredible audio reproduction. As the ideal companion to any portable or home audio source, the E4c's Tuned Port design improves airflow around the driver to deliver professional-grade sound with extended bass response. The E4c comes with a stylish, compact carrying case, providing a convenient, tangle-free way to store your earphones. Also included is a level attenuator, to control volume level for comfortable listening from any high-output audio source, such as airplane armrests.