Material: Aluminium alloy
Operation: manual hand lever operated
Sound output: 110±2(dB)
Audio frequency: 550±20(HZ)
Transmission distance: 1000(Φm)
Features and Benefits
Handle and Cranking Lever Folds.
No Power Supply Required.
Compact for Portability.
Powerful Universally Recognized Sound.
Manual Hand Crank Operated Air Raid Siren.
Produces a loud adjustable sound of 110 decibels.
Made out of durable aluminium alloy.
Ideal for getting peoples attention, or rooting for your favorite team in sporting events, and many more applications.
By manually rotating the handle, the gearbox of the transmission step by step acceleration to achieve the purpose of sound, the sound depends on the rotation speed of the handle.
1. Please allow 1-3mm error due to manual measurement.Pls make sure you do not mind before you bid.
2. The color may have different as the difference display,pls understand.
1 x Air Raid Alarm