RemixIconEx.Device.router

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

router(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.Device.router()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M11 14v-3h2v3h5a1 1 0 0 1 1 1v6a1 1 0 0 1-1 1H6a1 1 0 0 1-1-1v-6a1 1 0 0 1 1-1h5zM2.51 8.837C3.835 4.864 7.584 2 12 2s8.166 2.864 9.49 6.837l-1.898.632a8.003 8.003 0 0 0-15.184 0l-1.897-.632zm3.796 1.265a6.003 6.003 0 0 1 11.388 0l-1.898.633a4.002 4.002 0 0 0-7.592 0l-1.898-.633zM7 16v4h10v-4H7z" />
</svg>

example usage

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