Acme Tornado 2000 Whistle - 1 Dozen Three pitch frequencies make sure the whistle is heard over extremely loud crowds and over far distances All-weather design is great for use during outdoor games and tournaments Pea-less whistles are ideal for coaching, refereeing and lifeguarding to keep players or swimmers safe and alert Split ring enables attachment to a keychain or lanyard for easy access during the game Black finish makes these whistles a low-profile addition to any staff uniform