The RC-MH1 is a 3.5mm - 3.5mm audio cable specifically designed for V-Moda Cross fade M-100, M-80, Philips Fidelio X1, and Sony MDR1R series headphones. FiiO designed this cable to be strong and long-lasting. Conductivity is enhanced by using a high-purity copper core and gold-plated 3.5mm connectors.