Simplex 4904-9053

A ceiling-mount strobe is what this alarm is.

Also in the collection
Simplex 4903-9219H

Simplex 4903-9219H

Category :
This alarm is specially made for high-humidity situations such as swimming pools. That’s what the “H” in the model number...
GE 521BXT

GE 521BXT

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