Hand Crank Air Raid Siren 110dB Base Mount Manual Emergency Alarm
Product Description
Hand Crank Air Raid Siren 110dB Base Mount Manual Emergency Alarm
- Manual Hand-Crank Operation – No batteries or electricity needed. Simply rotate the handle to generate sound—speed controls volume and pitch (faster = louder/higher frequency).
- Durable & Portable – Made of lightweight aluminum, compact size and features a stable base/table mount for indoor/outdoor use.
- Adjustable Volume Control – Spin faster = louder alarm! Control sound intensity (up to 550±20Hz) by hand speed. For maximum volume, open the blades to amplify the siren’s reach—ideal for drowning out wind or background noise.
- Powerful 110dB Alarm – Produces loud emergency alerts (110±2 dB at 1m) with a piercing 550±20Hz frequency, audible up to 1000m away. Ideal for factories, schools, military, disaster relief, and public safety.
- Versatile Emergency Tool – Critical for flood control, forest fires, industrial accidents, and survival scenarios. Trusted by militaries, families, and first responders.
Technical Specifications
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