Simplex 4050-81 Category : Simplex The only difference between this and the Simplex 4050-80 is that this runs off of 24 VDC rather than 120 VAC. Brand SimplexModel 4050-81Manufacturer SimplexType Alarm (Light)
Simplex 4901-9822 Category : SimplexThis is an electronic horn, not an electromechanical horn or a speaker.
FCI S241575-FC Category : FCIUnlike my other FCI-rebranded System Sensor SpectrAlert Classic, this one does not have an FCI logo on the front.
