✔︎【Robust and Portable】- Lfhelper SY-200 hand-cranked siren delivers a high-frequency sound with exceptional penetration over long distances. Its compact design ensures easy storage and transportability, ideal for various applications. ✔︎【Manual Operation, Reliable Performance】- Designed for situations without power, this manual siren operates effortlessly with a hand crank, producing a powerful 120dB sound at 600Hz. Perfect for emergencies in remote locations or during power outages. ✔︎【Sturdy Construction】- Crafted from sturdy aluminum alloy, the SY-200A handheld siren ensures durability and longevity. Its green color enhances visibility and its compact size facilitates easy handling and fixing. ✔︎【Versatile Emergency Tool】- Suitable for diverse environments including factories, schools, military camps, and outdoor settings like ships or forests. Provides essential audible alerts in emergencies where conventional alarms may fail. ✔︎【Essential Safety Companion】- Be prepared with our hand-cranked siren, ensuring reliable emergency signaling during crises such as fires, tornadoes, or air raids. A must-have for safety-conscious individuals and organizations., Weight: 0.009479877266 Pounds, Manufacturer: Lfhelper