Hand crank alarm — compact, durable, manually operated audible alert for industrial, commercial and home use. Key benefits Reliable without power: Manual operation provides an immediate audible alert during power outages or when electrical alarms are unavailable. Attentiongetting: Mechanical horn is designed to cut through ambient noise to alert people quickly in emergencies. Portable and adaptable: Compact, lightweight design works for handheld use or fixed installation where a dependable alarm is needed. Durable construction: Aluminium alloy housing resists rust and wear for longer service life in demanding environments. How it works Manual activation: Rotate the handle clockwise to generate the alarm sound. Simple volume control: Sound level varies with the rotation speed of the handle — faster cranking produces a higher output. No batteries or electricity required: Operates solely by mechanical input, making it reliable in outages and remote locations. Key attributes Function: Handcranked audible alarm for emergency alerts, drills and signaling. Compatibility: Suitable for factories, warehouses, ports, flood control sites, public areas and home use. Size and portability: Compact and lightweight for easy carrying, mounting, or temporary placement. Material and durability: Built from aluminium alloy for rust and wear resistance and structural strength. Performance: Mechanical horn with usercontrolled volume via handle rotation speed. Practical use scenarios Factory safety: Handheld or mounted to warn workers of equipment failure, evacuation orders or shift changes when electrical systems are offline. Flood control and evacuation: Use as an immediate warning device to alert residents and responders during flood events or other local emergencies. Port, warehouse or public drills: Ideal for air raid drills, fire alarms and public safety signaling where a simple, reliable audible alert is required. Operation note To use, manually rotate the handle clockwise; the alarm's loudness depends on how fast you crank. Suitable for situations where a dependable, powerindependent audible alert is required, combining portability, durability and straightforward operation.