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)
Notifier BNG-1 Category : NotifierThis pull actually opens with a “B” key, the key most commonly used by Simplex.
Faraday 6234-E Category : FaradayI believe the “E” appendage on the end of the model number means it is a sync-strobe.
Federal Signal 950B Category : Federal SignalI’m not sure why there is a transformer on the side of this alarm.
