Gentex SHG-24-15/75WR

Category : FCI

Unlike my other FCI-rebranded System Sensor SpectrAlert Classic, this one does not have an FCI logo on the front.

Category : Siemens

This is the second alarm of this model which is in my collection.

Category : Simplex

I accidentally bought this particular unit not realizing I already had one. Oh well, happens.