All non-European Phoenix Sound systems have a grade crossing whistle/horn. Most of them also have a manual whistle/horn option. The manual whistle/horn stays on as long as the trigger is on. Some steam locomotive sounds have an alternate whistle ending, this adds a little more variety to manual playback. The alternate ending is used when the trigger is held on for a "long time." The length of time needed to trigger the alternate ending varies from one whistle to another. Currently the alternate whistle endings are available on the following sounds: