Hand -operated sirens is a portable, power-free signaling device made with a durable aluminum alloy body and steel tube stand. It produces a strong 125±2 dB(A) low-frequency sound with an effective range of up to 2500 meters, ensuring clear and universally recognized alerts. Featuring a shutter mechanism for continuous or warble signals, this lightweight hand-operated siren is easy to carry and simple to use, making it ideal for emergency warnings, drills, and remote locations.
1. No power supply required
2. Lightweight for portability
3. Powerful low-frequency sound
4. Universally Recognized Signal
5. Shutter mechanism to provide a choice of signals: continuous and warble
