The Fox40(R) Classic Fox with lanyard has a patented three-chamber design making this the whistle of choice for professional and amateur sport federations alike. Precise diagnostic testing ensures faultless whistle performance every time allowing you to cut through crowd noise with a consistent penetrating sound keeping the referee in control of the game. FEATURES: Official's / Referee whistle 3-chamber whistle for crisp, clear sound Pealess design eliminates freezing and jamming Sound power: 115 dB Includes durable lanyard Model: 12970Z Fox 40