These whistles operate with the press of a button instead of your mouth, allowing multiple people to use them while lowering the risk of spreading germs. Since you don’t have to blow into them, you can give verbal directions as you sound an alarm, and winded or injured people can easily activate them in an emergency. All of these whistles generate a loud, consistent sound. Use the included detachable wrist strap or a lanyard to keep them close at hand.

Apply air or steam pressure to produce a shrill tone and alert workers. Signal continues as long as pressure is applied.

The quick-opening valve on these whistles allows manual operation—pull the valve while air or steam pressure is being applied to produce a shrill tone and alert workers. The valve has a hole for attaching chain.