Buzzers are UL listed for use in environments where flammable gases, combustible dust, and combustible fibers may be present.

Horns are UL and C-UL listed for indoor and outdoor use in Class I, Division 2, Groups A, B, C, and D; Class II, Division 2, Groups F and G; and Class III, Division 2 hazardous locations.

Sirens can emit both continuous and pulse tones—pulse tones alternate on/off to draw greater attention than continuous tones.

The built-in motor-driven fan in these sirens generates a shrill tone that's audible over long distances.

Toss these pocket-size air horns when they run out of air.

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.

With no moving parts as well as sealed electronic components, this horn is built to last even in wet conditions.

These alarms beep loudly and repeatedly when a vehicle moves in reverse.