Solid and Reliable Construction Made from durable aluminium alloy, this handcrank siren is engineered for lasting performance. Its robust structure features a comfortable handle connected to a precision internal mechanical system. When the handle is rotated quickly, the siren produces a powerful, frequency alarm that instantly attracts attention, making it an essential alert tool in an emergency. Compact and Portable Design The siren's compact size and sturdy build allow for easy carrying and quick deployment whenever needed. Its mechanical operation requires no electricity, ensuring dependable use in locations where power is unavailable or unreliable. Lightweight yet solid, it is simple to operate even in urgent situations. Adjustable Volume for Flexible Use Sound output is directly controlled by the speed of handle rotation, offering users precise volume adjustment as required. For maximum alert coverage, faster rotation generates louder sound. The siren also features an adjustable blade mechanism to further amplify the alarm, delivering up to 110 dB of sharp, penetrating sound that carries over long distances. Performance Emergency Alarm With its ability to reach decibel levels and project sound effectively across large areas, this handcrank siren provides reliable alerts during critical moments. Its allmechanical design means performance is not affected by power outages or battery shortages, ensuring consistent operation wherever it is needed. Practical Applications Safety alerts for factories, construction sites, and warehouses where quick manual signalling is required. Outdoor emergency use in remote areas, campsites, or disaster zones with no electrical power supply. Crowd control or warning signal during events, drills, or searchandrescue operations. Specifications Material: Aluminium alloy Operation: Manual hand crank Alarm Output: Up to 110 dB Volume Control: Adjustable via crank speed and blade position Portability: Compact, lightweight, and easy to transport This aluminium alloy handcrank siren is built for reliability, simplicity, and performance, providing immediate and effective warnings in a wide range of environments.