KZ ATE Hi-Fi IEM Sports Headphones with Copper Driver Ear Hook and Foam Eartips Specially for Music Fans, Standard Edition Driver unit is made by top-quality copper, the resolution is higher than ordinary drivers and with the vast sound field, and it could response great vocal at treble and bass, offering a kind of ease auditory sense. Gold-plated jack, could prevent oxidation efficiently, and with 32 core oxygen-free copper cable, the sound will not be distorted, giving you a better audio restoration. Cavity, which is made by resin, is environmental and durable. It has a longer lifespan. And the ergonomic designed ear tips, combined with CVC noise cancelling technology, not only efficiently reduce the background sound, but also offer a long-lasting comfortable wearing. Crafted design with stylish appearance and practical functions, compatible with most IOS and Android system smart phone, a professional earphones for you. 12 months worry-free warranty.