Fox 40 whistle Patented Penetrating Pealess Whistle 115 decibel rating (blue & red colours) comes with Lanyard. The Fox 40 Classic is designed to be heard above crowd noise, the roar of engines, breaking waves and thundering gale-force winds. The chambers are designed to self-clear when submerged in water. There are no moving parts to freeze, jam or deteriorate, flawless, consistent and reliable. The harder you blow, the louder the sound Easier to blow and cannot be overblown. Sound will be heard a mile away. The Fox 40® Classic™ is the standard choice for rescue professionals and general safety worldwide