See photograph.
This is an ultrasonic system designed for out buildings i.e sheds, garages etc that HAVE mains electricity.
It has an ultrasonic detector unit that is plugged in at the area to be protected; and an alarm unit plugged in at the main building.
It uses the mains wiring to transmit between the 2 units (in the same way as powerline adapters are used for the internet).
Instruction included.
Intruder Alarm (Bilton CV22)
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