Automatic and Autonomous Intruder Alarm.
Whilst searching Google for an autonomous intruder alarm, this post made me laugh out loud… I wrote it:
Posted on August 28, 2015 By Michael Griffiths
Whilst searching Google for an autonomous intruder alarm, this post made me laugh out loud… I wrote it:
Category: Wilden Marsh Nature Reserve
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The Romans used the same device.
I’m not surprised, Tom. They are still extremely effective today