Hand Crank Siren Horn 110db Manual Operated Metal Alarm Air Raid Emergency Safet You can it on your

You can it on your door

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Hand Crank Siren Horn 110db Manual Operated Metal Alarm Air Raid Emergency Safet You can it on yourHand Crank Siren Horn 110db Manual Operated Metal Alarm Air Raid Emergency Safet Features: It is used for emergency warning and easy to carry. Can be used for factories, families, schools, flood control, disaster relief,public and industrial occasions. Timely warning, reduce the loss of people 's property and casualties. By manually rotating the handle, the gearbox of the transmission step by step acceleration to achieve the purpose of sound, the