Enhance safety and emergency response with this durable Hand Crank Alarm, expertly constructed from high-quality aluminum alloy for robust performance and long-lasting use. Designed with a solid structure featuring a comfortable handle and internal mechanical device, it produces a powerful high-frequency alarm sound when the handle is rapidly cranked. This manual alarm is an essential safety tool that operates without electricity, making it reliable in power outages or outdoor emergency situations. Key Features: · **Durable Aluminum Alloy Construction:** Crafted from premium aluminum alloy, providing sturdy and reliable performance while ensuring long-term durability. · **Compact and Portable Design:** With a compact size measuring approximately 205x198x115mm and weighing about 1833g, this siren is easy to carry and install wherever emergency warning is needed. · **Adjustable Volume:** The alarm volume varies with the speed of the hand crank; faster rotations generate louder sound, with the ability to activate a trigger mechanism that opens blades to further amplify the alarm. · **Loud and Penetrating Alarm:** Generates a sharp, penetrating sound reaching up to 110±2dB(A) at 1 meter, with a sound frequency of 550±20Hz, ensuring effective sound transmission across large areas. · **Wide Effective Range:** Covers an impressive alarm radius of up to 1000 meters (3280 feet), making it suitable for factories, schools, warehouses, oil depots, flood prevention sites, disaster relief areas, and other public or industrial locations. · **Wireless and Manual Operation:** Fully mechanical and wireless, the alarm functions without any electrical power source, ensuring dependable emergency signaling during power failures or in remote settings. · **Versatile Safety Application:** Ideal for sudden fires, attacks, natural disasters, self-defense alerts, and other critical emergencies where an immediate and loud warning is required. Specifications: · Material: Aluminum Alloy · Weight: Approx. 1833g / 64.66oz · Size: Approx. 205x198x115mm / 8.07x7.80x4.53in · Mounting Hole Spacing: Approx. 60x60mm / 2.36x2.36in · Alarm Type: On-site Manual Alarm · Sound Pressure Level: 110±2dB(A) at 1 meter · Sound Frequency: 550±20Hz (Speed-dependent) · Effective Alarm Range: Diameter 1000m / 3280ft · Communication Method: Sound Transmission Package Includes: · 1 x Hand Crank Alarm This Hand Crank Alarm provides a reliable, high-intensity warning solution without reliance on electricity, making it indispensable for emergency preparedness in homes, workplaces, and outdoor environments. Its sturdy aluminum alloy build, adjustable volume, and wide sound range make it a trusted safety device to help protect lives and minimize property damage during critical situations.