Hand Crank Siren Horn Portable, 120db Portable Manual Operated Air Raid Siren Home Self Protection Hand Operated Crank Air Raid Safety Siren Fire Emergency Alarm for Factories Schools

• Working Principle:By manually rotating the handle, the of the transmission step by step acceleration to achieve the purpose of sound, the sound depends on the rotation speed of the handle
• Powerful Sound:This hand operated lightweight siren produces a loud adjustable sound of 120dB powerful universally recognized sound
• Application:Ideal for getting people attention on camps, schools, while cheering your favorite team in sport events or any place that you want to produce an effective warning sound and electricity is not available
• Durable Material:This Hand Crank Siren is made of durable ABS Plastic Housing; The Lever folds for easy carrying on the included waist pack
• Easy to Carry:No power support, compact structure, easy to carry, a wide range of applications, such as the advantages of long life

Specification: Item Type: Hand Crank Siren Operation Type: Hand Operated Sound Type: Siren Construction: ABS Plastic Housing Size: Width: Approx. 5.51in Height: Approx. 9.09in Depth: Approx. 7.95in Decibel: 120db Size: Approx.11cm / 4.3in 23cm / 9.1in Product Description: 1. The portable alarm is a hand-cranked sounder that does not require power support. It is called differently due to local differences. 2. Including handle, gear speed increasing mechanism, slider, fixed wheel, ringing wheel, sound window cover, gear box, box frame, the handle is connected with the driving shaft of the gear speed increasing mechanism, and the output shaft of the gear increasing mechanism passes through The pin is connected with the sliding block, and the sliding block is connected with the flange of the impeller by friction transmission. 3. There is no need for power support, and the power is provided by shaking the handle to make the alarm send out an alarm The sound level depends on the speed of the hand. 4. In terms of and purpose, it is divided into fixed hand-operated alarm and portable hand-operated alarm. 5. Hand-cranked alarm is light in weight, easy to carry, can be detached, and the handle will sound an alarm. 6. Widely used in factories, schools, troops, special flood control, natural disasters, open barracks, air defense and other emergencies. 7. Can effectively provide timely early warning during the incident and reduce people's property losses and casualties. Package List: 1 x Hand Crank Siren