Coaches and referees can certainly use this Two Tone Whistle! Our USA-made 2 5/8" x 7/8" two tone whistle with a 30" unattached chain comes in a wide selection of colors for you to choose from. Make this a smart business investment by adding on a message or your company's logo thanks to our print capability. It's a perfect promotional item for your next trade show, fundraiser or corporate picnic. Make some noise and order yours today!