Simplex 4903-9238 Category : Simplex This unit has an electronic horn, as opposed to the speaker or electromechanical horn found in other rectangular Simplex notification appliances. Brand SimplexModel 4903-9238Manufacturer SimplexType Alarm (Horn/Strobe, 4-wire)
Gentex GX90S-4-15/75WR Category : GentexI also have the version of this alarm that is rebranded by Simplex.
