The Quad-Driver Westone W40 in-ear headphone will take your listening experience to an entirely new level. Four balanced armature drivers and a three-way crossover network deliver breathtaking clarity and realism. Westone’s True-Fit technology provides superior ergonomics and comfort. Westone"s 50+ years of experience with in-ear applications has yielded a low-profile, lightweight, universal earpiece which delivers maximum comfort and in-ear coupling for dynamic transfer of sound. A replaceable cable connection includes the braided EPIC cable and round MFi cable with 3-button Apple Control System and mic function, including volume +/- , tracking +/- , phone answer, and Siri activation. Westone"s balanced armature drivers are significantly more compact and efficient than traditional dynamic drivers. By combining multiple balanced armature drivers with sophisticated crossover networks, Westone earphones provide enhanced sonic detail and a frequency range that extends well beyond typical in-ear solutions. Exchangeable black, blue and red color faceplates are included with secure attachment. Each set of W40 earphones comes with an EPIC replaceable cable and MFi G2 cable, premium comfort tips, mini-monitor vault, cleaning tool, and 2-year warranty. The Mini Monitor Vault is constructed of a high-impact polymer and is the perfect size for travel and storage. It features a protective foam interior and weather resistant design. The Westone W40s are ideal for classic and hard rock, heavy metal, alternative, classical, vocal, jazz, and acoustic music, delivering stunning audio in a quad-driver design.