The Fox 40 is a world-renowned pealess whistle featuring a patented three-chamber design that produces a sharp, penetrating sound without any moving parts to jam or freeze. Its signature high-pitched blast can reach up to 115–122 decibels, ensuring it can be heard over a mile away and through the loudest crowd noise. Constructed from high-impact, non-toxic polycarbonate, this durable whistle is completely waterproof and designed to self-clear immediately after being submerged in water. Trusted by professional leagues like the NBA, NFL, and NHL, it remains the premier choice for referees, rescue professionals, and outdoor safety officials worldwide.