Simplex 2901-9806 Strobes such as the ADT B3409-024 were designed to be used with this horn. Brand SimplexModel 2901-9806Manufacturer Federal SignalType Alarm (Horn)
Simplex 636-820 Category : SimplexThis is the Simplex 4010 user interface which was taken out of a broken 4010.
Simplex 4903-9418 Category : SimplexThe lack of TrueAlert branding on the front of the alarm, as well as the odd grille, are signs that...