Crank Siren, 110±2dB Powerful Air Raid Siren, Manual Operated Metal Emergency Safety Alarm, Compact Portable Air Horn for Tornado Fire

Solid structure: made of aluminum alloy. Composed of a handle and internal mechanical device, it generates a high frequency alarm when the handle is turned quickly, effectively attracting attention in case of emergency. Compact and Portable: With a compact and sturdy design, making it easy to carry and use, it provides an effective warning in emergency situations, proving indispensable where there is no electricity. Adjustable volume: volume may vary depending on how fast the handle is turned. The faster the rotation, the louder the sound, and a trigger can open the blades to amplify the sound even more. LOUD ALARM