RemixIconEx.Media.headphone

You're seeing just the function headphone, go back to RemixIconEx.Media module for more information.
Link to this function

headphone(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.Media.headphone()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M12 4a8 8 0 0 0-8 8h3a2 2 0 0 1 2 2v5a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2v-7C2 6.477 6.477 2 12 2s10 4.477 10 10v7a2 2 0 0 1-2 2h-3a2 2 0 0 1-2-2v-5a2 2 0 0 1 2-2h3a8 8 0 0 0-8-8zM4 14v5h3v-5H4zm13 0v5h3v-5h-3z" />
</svg>

example usage

svg.icon {
  width: 96;
  height: 96;
}