ALARM & SIRENER
Alarm & Sirens are devices that produce an audible signal usually like a steady high-pitched tone that is encased within a molded housing. The characteristics are therfore driver circuitry, input type, voltage rated, voltage range, frequency, sound pressure, technology, operating mode, and current supply. The technology is magnetic, piezo, and/or piezo (with feedback) while producing a frequency range 550Hz to 2800Hz.
