Tekfusion Twinwoofers In-ear Headphones (Black Edition) The 10mm dynamic drivers are designed to accurately re-produce sound, giving you a wide-range frequency response. You therefore get to hear your music more clearly than an ordinary pair of in-ear headphones. The drivers are optimized to deliver deep and precise bass. The all-metallic structure of the Twinwoofers attenuates unnecessary resonance which is one of the major sources of noise in many other in-ear headphones. Get pure and distortion free sound. With any of your preferred pair of eartips, sound is isolated well enough, so that you can enjoy your noise-free music in busy places, weather you are plane, bus, or ant other noisy environment, let nothing get between you and your music! The Twinwoofers come with a high-quality protective carry pouch in which you can store your pair when not in use