Fox 40 classic whistlethe original fox 40 whistle this is the one that changed the gamefor referees and coaches at every level who want every call to be heard and depend on its reliability the flawless consistent and penetrating sound keeps the referee in control of the game and can be heard above the crowds and players the chambers are designed to self clear when submerged in water and there are no moving parts to freeze jam or deterioratesound power 115 dbblack pink and white