Simplex 4903-9403 Category : Simplex The strobe on this alarm model isn’t directly connected to the alarm, oddly enough. Brand SimplexModel 4903-9403Manufacturer SimplexType Alarm (Horn/Strobe, 4-wire)
National Time SG-C4HSZ Category : National TimeThis is a ceiling-mount Gentex Commander 4 Horn/Strobe, which is rebranded by National Time.
