Siemens AW-1 This device is simply a button, nothing very elaborate. Brand SiemensModel AW-1Manufacturer SiemensType Switch
System Sensor P4R Category : System SensorUnlike my System Sensor P2R, this alarm does 4-wire operation.
Edwards 276B-1320 Category : EST/EdwardsThis is essentially the single-action, non-addressable version of the EST SIGA-278.