STEREO HEADPHONES - The moving coil adopts vibrating diaphragm system made of multilayer polymer metal composite material and 99.95% all-copper core. Better conductivity to ensure low distortion of audio signal. In coordination with optimized tuning scheme, the overall sense of listening is more balanced and sturdier, the low frequency is lower, the bass is powerful and produce excellent clear sound with pure, natural timbre and more details. WIRED HEADPHONES - Light aluminum alloy earbuds provide all-day comfort; oxygen-free copper wiring blocks interference for better-sounding audio; durable thermoplastic elastomer cable stands the wear-and-tear of life. EARPHONES - Built-in microphone and one button remote for answering calls hands free.Gold-plated 3.5mm audio jack for no-loss sound connection to your audio device.