Question

 How Does a Personal Alarm Work?

Answer Personal alarms are small, mobile devices that emit a loud sound or siren when activated. They give people a simple, effective, first-line defense when exposed to threatening situations.
http://www.ehow.com/facts_7353210_personal-alarm-work_.html

Top Q&A For: How Does a Personal Alarm Work

How does an alarm bell work?

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Does Leakfrog work like a smoke alarm?

Yes, a Leakfrog water alarm works by detecting water as shallow as 1/32 inch. When water is detected, an alarm goes off and continues to sound until it is shut off. Leakfrogs are often used in bas... Read More »
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