NICCOO Hand Crank Alarm Air Raid Siren Manual Operated Horn Loud Fire Emergency Safety with Stand Base 125dB Green

⭐【HAND-CRANKED】The desired alarm effect is achieved by simply manually shaking the handle clockwise at a primary speed (2500 revolutions per minute), producing a majestic sound with a large shock and long wavelength. ⭐【NO POWER REQUIRED】The hand crank alarm requires no power supply and can provide an effective alarm in places where there is no power supply. Perfect for emergency situations where immediate attention is crucial. ⭐【SOUND-WINDOW DESIGN】Featured a unique sound window design, by adjusting the switch, you can open and close the window. When it is opened, the sound becomes louder, and when it is closed, the sound is dull(little difference). ⭐【PRACTICAL & CONVENIENCE】When power and traffic are blocked, other mobile alarms can not enter the alarm area, and the portable and practical hand crank alarm becomes a very practical alarm. ⭐【WIDE APPILCATION】Widely used in factories, schools, open-air military camps, mountain rescue and anti-ship vessels, ships, mines, plains, pastures, gas stations, airports, forest farms, hotels, etc. When power and communication fail, this portable alarm is a reliable solution., Weight: 16.314207388 pounds, Manufacturer: NICCOO