Simplex GX90S-4-15/75WR Category : Simplex This alarm is essentially a Gentex GX90 (Simplex GX90-4R) with a Gentex GXS-4-15/75WR strobe attached to it. Brand SimplexModel GX90S-4-15/75WRManufacturer GentexType Alarm (Horn/Strobe)
Honeywell SC809A1019 Category : HoneywellThis type of speaker has been re-branded by many other companies, such as Simplex.
Gentex GXS-4-15/75WR Category : GentexThis alarm uses the same strobe as other Gentex alarms such as the Gentex GX90S-4-15/75WR and Gentex GOS-24-110WR.
