Granvela All Metal Earphones with Microphone, R51 Hi Fidelity Earbuds for Smartphone-Gold Well-designed components combination lowers sound distortion. Braided composite cable is flexible and anti-winding with long service life and reduces microphony noise. Aluminum alloy housing with CNC machine mold presents metallic gloss , give you the textured feeling. Metal audio cavity reduces the impact of cavity resonance to deliver better audio effect. OFC cable features excellent conductivity and performs delicate sound.