Paging system- set with power supply, from the Berker Q.3 series.
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cancellation of the alarm signal by means of the canceling button at the location of the emergency situation audible and optical alarm signaling by the light indicator after activation of the normally open pull switch powered by a 24 V DC power supply with screw terminals possibility of setting the bell as a continuous or pulsating signal possibility of connecting a sound signal to a light indicator control of initiating devices for wire breakage