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Intrinsically safe light and sound sirens are used in fire alarm systems, in evacuation control systems, extinguishing systems etc. in explosive areas Power supply voltage - 12 V 5 variants of labels (or custom). CURRENT CONSUMPTION:50 mA POWER SUPPLY VOLTAGE:12 V SOUND PRESSURE LEVEL:65 dB DIMENSIONS:280х100х32 mm OPERATING TEMPERATURE RANGE:from -10°С to+55°С