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Based on the image provided, this device is an industrial motor-driven siren, specifically the MS-490 model (or a very similar variant). It is designed to produce a high-decibel, continuous alarm for emergency situations.
Key Specifications & Use Cases
Model: Commonly identified as the MS-490.
Sound Level: It is capable of reaching volumes up to 150 dB, which is extremely loud and suitable for noisy environments.
Power: These units typically run on AC power, with common versions for 110V or 220V.
Construction: Features a heavy-duty metal body, often made of aluminum or steel, to withstand industrial conditions.
Applications: It is primarily used for fire alarms, civil defense, air raid warnings, and security in large areas like factories, docks, or mines