Geometry have open edges only on wires and may be curved by editable lines. Model have only quad polygons and ready for turbosmooth. No poles with more than 5 edges. Create in real-world scale, millimeters unit system. All objects and materials have suitable names. Object are contained in a separate layer 'Headphones'. Object don`t have textures. For envoronment used HDRI map (HDRI Room 1 BW.hdr include in archive) and 1 Vray Light.