Tornado Siren, Compact Portable 110dB Hand Crank Siren Sound for Schools for Industrial Places (Green)

Solid Structure: Crafted from aluminium alloy. Composed of a handle and an internal mechanical device, it generates a high frequency alarm when the handle is turned rapidly, effectively drawing attention in an emergency.
Loud Alarm and Solid Construction: With an adjustable volume that can up to 110dB, the hand crank siren offers a , penetrating sound with a large transmission range, making the siren durable and long lasting.
Compact and Portable: With compact and sturdy design, making it easy to carry and operate, it provides an effective warning in emergency situations, proving indispensable where there's no electricity.
Adjustable Volume: The volume can be varied, depending on the speed at which 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.
Wide Application: Ideal for use in various situations such as sudden fires, attacks, or emergencies, can also be used as a self defense tool, its manual operation allows it to offer an effective alarm without the need for a power source.