Fox 40 Classic Whistle with Lanyard Used by referees and coaches at all levels Sharp, clear tone ensures every call will be heard Flawless, consistent and penetrating sound Fox 40 classic No-pea whistle invented by Ref Ron Foxcroft as a result of his no sound frustration with blowing a pea whistle The Fox 40 will draw attention in virtually any situation, regardless of room size, distance or background noise