System Sensor MA/SS-24I Category : System Sensor This is a ceiling-mount alarm with HALON lettering. Brand System SensorModel MA/SS-24IManufacturer System SensorType Alarm (Sounder/Strobe)
Amseco FS1-1+SL-02 Category : AmsecoSL-02 is the model of the strobe, FS1-1 is the model of the sounder.
Wheelock MB-G10-24-R Category : WheelockI’m missing this unit’s label, so that model number is only a guess. It’s probably right though.