Simplex 2098-9788 This is like the Simplex 2098-9806, but it doesn’t have a switch. Brand SimplexModel 2098-9788Manufacturer SimplexType Indicator
Faraday 5940 Category : FaradayYou can see straight through the grille on this horn to the metal plate on the mechanism.
System Sensor P4R Category : System SensorUnlike my System Sensor P2R, this alarm does 4-wire operation.