Fire Strobe sounder with Ambulance sound, Pumper, Sound Conventional Fire Alarm Control System: SG109 Sound Strobe/ sounder General The SG109 Sound Strobe of notification appliances offers a wide range of Sound/strobes, for wall and ceiling applications, indoors and outdoors. They are designed to be used in 24 volt DC systems. Key Specifications/Special Features DC16-30V Powered Sound Tone can be selected:I-Ambulance, II pc, III- Fire-engine Long life of Strobe:Minimum 40000 times Strobe flash rate: 1 flash per second Loud alarm sound: Minimum 100dB Suitable for the majority of conventional fire alarm systems 2-wire, DC24V Sound Strobe;