Feature Highlights: 1. Manual & Portable Design – Easy to carry and operate by hand, ready for use anytime, anywhere. 2. Wide-Range Applications – Ideal for factories, homes, schools, flood control, disaster relief, and public or industrial safety scenarios. 3. Hand-Crank Powered Sound – Simply rotate the handle to generate a loud alarm—no batteries or electricity needed. The faster you turn, the louder the sound. 4. Durable Aluminum Alloy Build – Made from sturdy, wear-resistant metal for reliable performance in demanding conditions. 5. Emergency Ready – Provides timely audible warnings to help protect people and property during emergencies. Product Details: This handheld alarm siren is manually operated and fully portable, making it a practical safety tool for various situations. By cranking the handle, the internal gear system amplifies motion to produce a powerful alert. Its sound level depends on rotation speed, offering clear, far-reaching audio signals. Crafted from robust aluminum alloy, it’s built to last. Use it for fire drills, earthquake preparedness, outdoor work, or community warnings—compact, reliable, and always ready when you need it. Specifications: - Item Name: Handheld Alarm Siren - Material: Aluminum Alloy - Sound Rating: 110±2dB(A) @1m - Frequency: 550±20Hz (varies with rotation speed) - Effective Range: Up to 1000m - Size: 20.2cm x 23.1cm x 11.5cm / 7.95" x 9.09" x 4.53" (Approx.) Notes: - Color may vary slightly due to lighting and screen settings. - Slight size variations may occur due to manual measurement. Package Includes: 1 x Handheld Alarm Siren