System Sensor HRA This is the Canadian version of this alarm. Brand System SensorModel HRAManufacturer System SensorType Alarm (Horn)
Space Age AV32 Category : Space Age ElectronicsI have no idea why there is no fire lettering on this unit
Space Age AV32+2DCD Category : Space Age ElectronicsThat is an electromechanical horn on the rear of the strobe plate.