The Fox 40 Classic Official Whistle with Break-Away Lanyard is a trusted choice for referees, coaches, and rescue professionals. This whistle's innovative chambers are engineered to self-clear when submerged in water and it's designed to never jam, freeze, or deteriorate. It's not just easy to blow, but it's impossible to overblow. Whether you're overseeing a chaotic sporting event, navigating through gale-force winds, or signaling for help amidst the roar of engines, this whistle ensures your sound will pierce through the noise. The louder you blow, the louder the sound, reaching up to a mile away. Dependable and consistent, it's a reliable accessory for any outdoor adventure or professional engagement.