LOUD & CLEAR: Just squeeze and our squeeze coaching whistle provides a loud, clear sound FOR ALL SPORTS: Great for all sports including, volleyball, basketball, soccer or whenever a whistle is needed HYGIENIC & SAFE: Easy to use single hand operation is more hygienic when sharing whistles INCLUDED: Lanyard ring included QUALITY SPORTS GEAR SINCE 1989: Tandem Sport has been manufacturing and distributing quality volleyball, sports medicine, equipment and training devices to the sporting goods market since 1989