Hand Crank Siren Loud Portable Manual Fire Alarm Handheld Horn Manual Operation Siren Loud Air Defense Siren Mobile Alarm

HAND-CRANK ALARM: When the electricity and traffic are blocked, other mobile alarms cannot enter the alarm area, and the portable and convenient hand-crank alarm becomes a very convenient and practical alarm
WIDELY USED: Factories, schools, troops, flood control, natural disasters, open-air military camps, civil air defense, mountain rescue and seaside anti-ship, forest fire prevention, flood control, fire protection, prisons, reservoirs, ships, mines
SAFETY WARNING: In case of emergency, the necessary items for emergencies anywhere can be effectively and timely warned, and can be used anytime, anywhere
LOUD ANTI-AIRCRAFT SIREN: The loudness of the siren depends on how fast the handle is shaken
EASIER TO CARRY: The manual siren is lightweight, easy to carry, detachable, and sounds an alarm when you hold the handle

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