Intruder or burglar alarms are designed to protect individuals and valuables in both homes and workplaces. These alarms can be either wired or wireless. Wired security systems offer permanency and can be harder to dismantle. Wireless systems also are effective, but may offer more flexibility and can be relocated, if needed.
Audible intruder alarms are perimeter alarms that set off a loud siren when triggered. They are one of the cheapest security systems available, but they are also prone to misfires and government restriction.
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