System Sensor SR This is a SpectrAlert Adavnced remote strobe. Brand System SensorModel SRManufacturer System SensorType Alarm (Strobe)
National Time SG-C3HSZ Category : National TimeThis is the equivalent of a Gentex Commander 3 horn/strobe.
EST SIGA-278 Category : EST/EdwardsThis unit is rusting ever so slightly. It features a newer EST logo on it.