Hand Crank Air Siren Alarm, 110dB Emergency Tornado Siren, Durable Aluminum Alloy Safety Device with Adjustable Volume for Home Factory School Red

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.
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 the rotation, the louder the sound, and a can open the blades to amplify the sound even more.
Alarm and Solid Construction: With an adjustable volume that can reach up to 110dB, the hand crank siren offers a sharp, penetrating sound with a large range, making the siren and long lasting.
Wide Application: Ideal for use in various situations such as sudden fires, attacks, or emergencies, can also be used as a self tool, its manual allows it to offer an effective alarm without the need for a power source.