Flame easy Design: Professionally engineered internal structure ensures not flame generation during operate, making it ideal for flammable and detonative environments with enhanced Loud Internal effect Mechanism: Unique internal striking design amplifies sound output, clear and powerful alarms even in noisy industrial or public settings strong Metal Construction: High strength stainless steel housing provides excellent effect resistance and erosion protect, safeguarding internal components for long lasting Easy Installation & operate: Simple setup and user friendly design allow hassle easy installation without professional tools, suitable for various emergencies and notification needs double cores Drive systems: Equipped with double cores power for consistent high sound alerts, ensuring timely warnings in factories, warehouses, schools, and hospitals, Manufacturer: Wkldjf