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.

Sound Isolating Technology
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.

Speaker Type: High-Definition Drivers with Tuned Port Technology
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.

• Personal Fit Kit
  Because every ear is different, E4c Earphones come with a pair of disposable Foam Sleeves, a pair of Triple Flange Sleeves, three pairs (small, medium, large) of Flex Sleeves, and three pairs of Soft Flex Sleeves (small, medium, large) to ensure the ideal personalized fit.
• Secure In Ear Design
  The soft, flexible sleeves in the Fit Kit gently contour to the inside of your ear to create a comfortable, secure fit, so that the earphones don't fall out while you're exercising. The E4c's are also compatible with custom-molded sleeves, made by a hearing specialist, for the ultimate in fit and comfort.
• Lightweight Construction
  Weighing only 1.1oz (31 g), the E4c is lightweight and secure enough for any portable listening application.
• Earphones Carrying Case
  The E4c comes with a stylish, compact carrying case, providing a convenient, tangle-free way to store your earphones.
• Level Attenuator
  An included volume level control allows for comfortable listening from any high-output audio source, such as airplane armrests.
• Professional Grade Warranty and Money-Back Guarantee
  Every E4c ordered from this website comes with a 30-day, no-questions-asked, money-back guarantee, plus a two-year warranty on materials and workmanship.