Simplex 4903-9101 Category : Simplex The only difference between this and my other Simplex 4903-9101 is that this strobe is meant to be on the bottom rather than on the top. Brand SimplexModel 4903-9101Manufacturer SimplexType Alarm (Strobe)
Simplex 2098-9806 Category : SimplexThere is no difference between this unit and my other Simplex 2098-9806.
