This siren is an industrial-grade audible alarm device built for emergency and fire alerting. The housing is metal, mounted easily, and the siren uses double electric motors to generate very high decibel sound for wide-area alerting. It is indicated for use in industrial plants, mining, oil & gas, warehousing, and transportation hubs — places where loud, unmistakable audible signals are needed. Key Features: Working voltage: 220 V (AC) per one listing; Rated current: examples 2.2 A / 4.1 A; Receive frequency: 50-60 Hz (AC mains) for the motor siren; Decibel rating: 180 dB (very high); Material: Metal housing (e.g., aluminum + metal) and red anti-rust paint finish in some specs; Mounting: Screw fixing via metal housing, suitable for fixed installation; Duty cycle: Long duty cycle design (intended for continuous/extended use in emergencies); Application flexibility: Can be triggered via smoke detectors, gas sensors, timers, anti-theft alarm system. Industry Use / Applications: Mining and blasting operations (to signal blasts or evacuations); Power stations, factories, manufacturing plants (for emergency alarms, shift change signals); Warehouses, logistics hubs (fire alarms, evacuation signals); Oil & gas facilities (emergency notifications, equipment failures); Transportation hubs (airports, railway stations); Ships / maritime / offshore installations (where high-volume sirens are needed); Security systems (anti-theft alarms, large area alerting); Public buildings and commercial buildings for fire alarms and emergency notifications.