Pyrotronics ES0-24S

I have two of these alarms just because they’re so rare.

Also in the collection
GE 521BXT

GE 521BXT

Category :
I think that this smoke detector might be intended for use in security systems.
ADT B3407-024

ADT B3407-024

Category :
There exists a strobe which can be attached to alarms like this.
@