Approved by International Safety of Life at Sea Regulations. Used by mountain rescue teams, official whistle of the Ramblers Association in England.

THE SMALL WHISTLE WITH THE BIG SOUND

• Very popular in all sports, especially basketball and volleyball.
• Also chosen by many football referees.
• Regularly used in closed stadiums when the noise from the crowd creates a wall of sound.

Blowing Effort: Moderate

Sound Intensity: Very high

Sound Pitch: High