Ensure safety and prompt emergency alert with this high-performance Hand Crank Alarm, constructed from durable aluminum alloy with anti-rust coating for long-lasting use in various environments. Designed for easy manual operation, this emergency siren produces a powerful and adjustable alarm sound of over 110dB, activated simply by cranking the handle. The unique mechanical design generates high-frequency sound waves, effectively alerting people in urgent situations across a wide area. Key Features: · Adjustable and Loud Alert: The alarm volume varies with the speed of cranking, reaching an impressive sound level exceeding 110dB to ensure maximum attention when needed. · Robust Aluminum Alloy Construction: Built with a sturdy aluminum alloy frame coated with anti-rust paint to resist damage, corrosion, and water exposure, providing durability and reliable performance. · Effective Emergency Reminder: The crank-activated mechanical device emits high-frequency sounds (approx. 550±20Hz) that serve as an urgent warning signal in emergencies such as fires, attacks, or distress situations. · Portable and Efficient Design: Compact and solid build allows easy carrying and operation, ideal for large areas like factories, schools, warehouses, and public spaces where rapid alerting is critical. · Versatile Application: Perfect for use in multiple scenarios including fire emergencies, assault deterrence, flood control, disaster relief, and personal safety protection by attracting attention and requesting help. · Wide Audible Range: Capable of sounding an alarm audible within a diameter of approximately 1000 meters, ensuring broad coverage over expansive areas. Specifications: · Item Type: Hand Crank Alarm · Material: Aluminum Alloy · Communication Method: Sound Transmission · Alarm Type: On Site Alarm · Volume: ≥110dB · Sound Frequency: 550±20Hz (dependent on cranking speed) · Effective Range: Approx. 1000m diameter · Product Dimensions: 231 x 202mm (9.09 x 7.95 inches) · Weight: Approx. 1550g (54.67oz) This Hand Crank Alarm combines rugged durability with powerful sound output for reliable emergency signaling. Its manual operation requires no batteries or external power, making it an essential safety tool for industrial, commercial, and personal environments where immediate alerting is crucial. Equip your safety kit with this efficient and easy-to-use mechanical alarm to enhance emergency preparedness and protection.