It is known for its loud, penetrating sound with a decibel level of 115 dB, which can be heard over a mile away.
The whistle has a three-chamber, pea-less design that is reliable and cannot be overblown.
It is used by officials in the NCAA, NBA, NFL, CFL, FIBA, NHL, FIFA, and FINA.
The whistle is available in various colors and is often sold with a lanyard.