SUDEG Hand Crank Siren Horn Portable 110dB Manual Operated Metal Alarm Air Raid Emergency Safety Alarm for Schools Troops Alarming ,LK-100B Green

SUDEG

Compact & Portable Design​ - The LK-100B green hand crank siren horn boasts a small, lightweight structure that enables effortless portability and quick setup. No additional tools are needed for installation, and it only occupies a minimal footprint of 0.15 square meters with just enough standing space for one person to operate, making it highly convenient for on-the-go use. Power-Free & Easy Operation​ - This manual-operated alarm relies on no external power supply, ensuring reliable performance even in areas with no electricity access. To achieve the desired alarming effect, users only need to rotate the handle clockwise at a moderate speed of 50-80 revolutions per minute. This simple operation generates a powerful, resonant sound with strong impact and long wavelength, effectively grabbing attention in emergency scenarios. Reliable Emergency Backup​ - In critical situations where power and traffic are cut off, and other mobile alarm devices cannot reach the alert area, the LK-100B hand crank siren becomes an indispensable practical solution. Its independent, power-free operation eliminates reliance on external infrastructure, ensuring uninterrupted alarm coverage when other systems fail, thus enhancing overall emergency response capabilities. Versatile Application Scenarios​ - With its robust and reliable performance, this 110dB emergency safety alarm is widely applicable across diverse settings. It serves as a vital safety tool for factories, schools, open-air military camps, mountain rescue missions, anti-ship vessels, ships, mines, plains, pastures, gas stations, airports, forest farms, hotels, and many other locations that require timely emergency alerts. Precise Acoustic Specifications​ - The hand crank siren delivers consistent and effective acoustic performance with strict technical parameters:​ Sound output: 110 ± 2 decibels (dB), ensuring loud enough coverage for large areas​; Audio frequency: 550 ± 20 hertz (HZ), producing a distinct and penetrating tone​; Transmission range: 1000 meters in diameter (Φm), covering a broad perimeter to maximize alert reach., Weight: 4.739938633 pounds, Manufacturer: SUDEG