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 driver circuitry, input type, voltage rated, voltage range, frequency, technology, operating mode, and current supply. The technology is magnetic, piezo, and/or piezo (with feedback) with a frequency range 550Hz to 2800Hz.
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