Simplex 4903-9418 Category : Simplex The lack of TrueAlert branding on the front of the alarm, as well as the odd grille, are signs that this is an early version of the TrueAlert. Brand SimplexModel 4903-9481Manufacturer SimplexType Alarm (Speaker/Strobe, 4-Wire)
Silent Knight 5204 Category : Silent KnightThis particular panel has some sort of extra board mounted on top of the main circuitry. I also have the...
