The 13mm dynamic driver delivers rich highs, crisp mids and clear, balanced bass that makes you feel like you're at a live concert<br />Ergonomic semi-in-ear design, fit the ear canal, comfortable to wear<br />The E3103 is designed to give you the freedom to switch between single-ear and double-ear seamlessly. Share your music with your friend while you walk apart or wear only one earphone at a time<br />ENC environmental noise cancelling technology effectively picks up your voice and blocks out unwanted surrounding noise during your calls, so your friends can hear your better<br />Whether you're in a noisy coffee shop or working from home, take important calls while on-the-go. Enhanced voice pickup improves voice clarity so you can hear and be heard as if you’re talking face-to-face ">