Pack contains 3 Fox 40 Classic Whistles with 3 Lanyards 115DB Will be heard above ambient noise, loud crowds, the roar of engines, breaking waves, thundering gale-force winds, and up to a mile away. No moving parts to freeze, jam or deteriorate Chambers are designed to self-clear when submerged in water The Fox 40 Classic is the standard choice referees and coaches at all levels, rescue professionals and general safety worldwide