1. 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.
2. 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.
3. 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 can open the blades to amplify the sound even more.
4. Alarm and Solid Construction: With an adjustable volume that can up to 110dB, the hand crank siren offers a , penetrating sound with a large range, making the siren and long lasting.
5. 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 allows it to offer an effective alarm without the need for a power source.

Specification:
Item Type: Hand Crank Alarm
Material: Aluminium alloy
Weight: Approx. 1833.00g / 64.66oz
Mounting Hole Spacing: Approx. 60x60mm/2.36x2.36in
Size: Approx. 205x198x115mm / 8.07x7.80x4.53in
Communication Method: Sound
Type: Alarm Host
Alarm Method: On site Alarm
Sound Pressure Level: 110±2dB(A) at 1m
Sound Frequency: 550±20Hz (Depends on the speed of hand cranking)
Structure: Aluminum Alloy Alarm
Effective Range: Diameter 1000m / 3280ft
Wide Application: Widely used in factories, homes, schools, oil depots, warehouses, flood prevention, disaster relief, public and industrial places, it can quickly alarm in emergency situations and reduce casualties and property losses.

PackageList:
1 x Hand Crank Siren