Hand Crank Siren Aluminium Alloy 110dB Loud Alarm Siren Horns Alarm for Emergency

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 sy to carry and operate, it provides an effective warning in emergency situations, proving indispensable where there's no electricity.

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 trigger can open the blades to amplify the sound even more. 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 : Sound Type: Wireless Alarm Host Alarm : On site Alarm Sound Pressure : 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.