FOX 40 BRAND CLASSIC CMG PEALESS  WHISTLE
 
115 decibels of power ensures every call will be heard!
Cushioned Mouth Grip (CMG) thermo-plastic material provides superior grip and protection for teeth
Ideal for those who need to hold a whistle in their mouth for extended periods of time
 
Whistle technology ­ - from primitive to powerful
Why don't "pea" whistles measure up to Fox 40? It's because they use centuries-old technology ­ a pea or a ball, vibrating against a drum-like cavity to produce sound.
Less powerful sound isn't the only drawback. Things can stick to the pea ­ moisture, saliva, dirt, water ­ even ice, in winter. 
It doesn't take much to set the stage for failure ­ one good blow on the whistle and the pea can jam in the whistle cavity. 
Even a brand new pea whistle can go totally mute if you blow too hard, as you might in a panic situation. A jam-up means no vibration, no sound, no communication.
The ingeniously-designed Fox 40 whistle doesn't use a pea to generate sound. In fact, there are no moving parts whatsoever ­ nothing to obstruct sound, nothing to stick, freeze or fail. 
Fox 40's patented design moves the air blast through three-tuned chambers.