RemixIconEx.Media.volume_mute

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

volume_mute(icon_css_class \\ "icon")

iex> Elixir.RemixIconEx.Media.volume_mute()
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="icon">
  <path d="M10 7.22L6.603 10H3v4h3.603L10 16.78V7.22zM5.889 16H2a1 1 0 0 1-1-1V9a1 1 0 0 1 1-1h3.889l5.294-4.332a.5.5 0 0 1 .817.387v15.89a.5.5 0 0 1-.817.387L5.89 16zm14.525-4l3.536 3.536-1.414 1.414L19 13.414l-3.536 3.536-1.414-1.414L17.586 12 14.05 8.464l1.414-1.414L19 10.586l3.536-3.536 1.414 1.414L20.414 12z" />
</svg>

example usage

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