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)
Simplex 4904-9139 Category : SimplexI believe that this strobe plate was designed to be used with bells, such as the Simplex 2901-9333.
Simplex 4904-9053 Category : SimplexI accidentally bought this particular unit not realizing I already had one. Oh well, happens.
ADT Unimode 5 Category : ADTThis is a really nice FACP, although programming it is a bit difficult due to its odd key pad.
