The Worlds most Powerful Whistle;Two high pitch frequencies for loudness close to the whistle and a lower pitch for distance all sound simultaneously;Recommended for Referee's especially in big stadiums or anywhere that real power is required.;As used in FIFA Internationals, F.A. & Champions League Matches FIMBRA & FINA Matches;Pack of Two Whistles

• PACK OF TWO Acme Tornado Day Glo Orange Whistles-The World's Most Powerful Whistle

PACK OF TWO Acme Tornado Day Glo Orange Whistles-The World's Most Powerful WhistleAcme ( J Hudson (Whistles) Ltd