Feature 1ADJUSTABLE AND LOUD ALERT: The volume of the alarm can be adjusted depending on the speed at which the handle is turned. Simply crank the device to activate the on site alarm and produce an even louder sound. The alarm can reach a volume of more than 110db. 2ALUMINUM ALLOY CONSTRUCTION: This hand crank alarm features a sturdy aluminum alloy structure and coated with anti rust paint, making it strong, anti damage and waterproof. Its durability ensures a long service life. 3URGENT REMINDER: Featuring a handle and an internal mechanical device, the alarm can generate high frequency sound waves to emit a loud noise by simply cranking the handle. With its high volume, it effectively alerts people in emergency situations. 4EFFICIENT AND PORTABLE: The aluminum alloy emergency safety manual siren boasts a compact and sturdy design, making it easy to carry and operate. This makes it ideal for alerting people to emergency situations in large areas such as factories and public spaces. 5VERSATILE APPLICATION: Suitable for various scenarios including sudden fires, attacks, and emergency distress signals. The alarm can be used as a self guard tool to deter potential attackers or attract others for help, ensuring individual safety.Item Type: Hand Crank AlarmMaterial: Aluminum AlloyCommunication Method: Sound TransmissionAlarm Type: On Site AlarmVolume: 110dbSound Frequency: 55020Hz (Depends on the speed of hand cranking)Effective Range: Diameter 1000mProduct Dimension: Approx. 231x202mm / 9.09x7.95inWide Application: Widely used in factories, homes, schools, oil depots, warehouses, flood control, disaster relief, public and industrial places. It can timely sound the alarm in emergency situations, reducing casualties and property losses.Weight: Approx. 1550.00g / 54.67oz .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Hand Crank Alarm