Caul CMG


A referee whistle like no other!
Designed specifically to encompass
a flexible fingergrip.



  • The Fox 40 Caul® has a traditional harmonized trill tone and clear loud sound
  • The Cushioned Mouth Grip (CMG®) provides soft contact area and reduces impact on teeth
  • Compact pealess design for flawless performance
  • Flexible fingergrip fits various hand sizes and reduces transfer of impact energy to the hand
  • Elastomer material is warmer in cold arenas
  • Indestructible polycarbonate body
  • No moving parts to freeze, jam or deteriorate
  • Flawless, consistent and reliable
  • The harder you blow, the louder the sound
  • Easy to blow and cannot be overblown
  • Will be heard above ambient noise

Models Available:

  • With Fingergrip

Design: 2-chamber pealess + CMG
Sound Power: 110 dB

The Caul® is named in honor of the late John McCauley. John was regarded as one of the best referees in National Hockey League history.

Available Colors:


Words can not describe how humbled and proud we are as a family about this honorable milestone in my fathers legacy. Please accept our sincerest appreciation for making such a powerful impact in my fathers memory.
~ Blaine McCauley on behalf of the McCauley Family


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