System Sensor HRA Category : System Sensor This is the Canadian version of this alarm. Brand System SensorModel HRAManufacturer System SensorType Alarm (Horn)
Faraday 6234 Category : FaradayThis alarm uses an electromechanical horn. It is the same horn found on the Simplex 2901-9838.
Wheelock RSSWP-2475W Category : WheelockThis alarm has a weathered strobe, unlike my other Wheelock RSSWP-2475.