Genuine Xiaomi MI Piston Earphone II Headphone Headset In-ear Earbud with Remote & Mic for Smartphones (Gold) Very high sound performance and manufacturing quality Aluminum sound chamber forming diamond cutting knife, Beryllium diaphragm, New double damping system more pure balanced sound, Kevlar fiber cable, with TPE ends, Compatible with mainstream Android phones 3-button remote and mic, compatible with most Android devices A new coat of gold plated for that all-classic feel,New dual damping system for purer sound quality Volume up/down functions not supported on iOS devices.