This is a simple - easy to build - modular alarm system. When it's activated - it will sound the siren for a fixed length of time - and then switch off. So it won't annoy the neighbours. Its modular design lets you to add any number of Alarm Zones, Tamper Zones and Personal Attack Zones to your system.
This is a photograph of the Personal-Attack And Tamper Module . It will activate the siren 24-hours a day - even when the alarm is switched off. You can add as many of these PA / Tamper Modules as you like to the One Time Only Alarm.
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