Hardcover Edition Xiaomi Piston In-Ear Earphones Wire Control + MIC for iPhone 6 & 6 Plus , iPhone 5 & 5S & 5C, iPhone 4 & 4S, iPad, iPod, Xiaomi, Samsung Galaxy S6 / S5 / Note 4 (Gold) 1. Xiaomi piston IF commemorative edition earphones support Android, iPhone iPod and iOS equipment. 2. Dual-damping balance system makes the sound more pure. 3. Aluminum sound chamber forming by diamond cutting 4. Metal piston cavity design, can effectively reduce the resonant cavity adverse impact on the sound quality, a better bass performance 5. CD pattern unique patented