Call the play with Acme's Polished Brass Thunderer Whistle, a longtime favorite of over 200 sports bodies and referee associations worldwide. During a downpour, a windstorm, or the roar of the crowd, the fluctuating frequencies make these whistles easy to hear. They even work after total immersion in water, so bring one along on your next outdoor excursion. Whistle comes with a handy lanyard so you can always find it when you need it. The lanyard's soft nylon cord is woven to a 6 warp thickness and is approximately 20" long.