ACME Tornado Slimline Black Referee Whistle

The Tornado Slimline is a compact survival whistle measuring 2" x 1" x 1" with a single-piece black composition construction. It produces two simultaneous frequencies—a high pitch for close-range loudness and a lower pitch that carries over distance—making it effective for signaling in open or crowded environments. The whistle has been used in FIFA International, FA, and Champions League matches as well as FIMBRA and FINA competitions, demonstrating its proven performance standard. A keyring attachment allows you to secure it to gear, pack, or clothing for ready access in emergency situations.