Manual Air Raid Siren

Power Source: They don't require electricity, as they are powered by manually turning a crank handle. Usage: They are ideal for emergency situations, especially in areas without power, like campsites, mountain rescue operations, or coastal defense. Sound: They produce a loud and recognizable warning sound that can travel a significant distance. Functionality: The volume and tone of the siren can be adjusted by the speed and rhythm of the cranking.