Simplex 4903-9219 Category : Simplex This rectangular Simplex notification appliances has an electromechanical horn mechanism, rather than a speaker or an electromechanical horn mechanism. Brand SimplexModel 4903-9219Manufacturer SimplexType Alarm (Horn/Strobe, 4-wire)
Amseco MSB-10B-PV4 Category : AmsecoThis bell is specifically meant to be used in a fire alarm system.
