110dB Hand Crank Air Raid Siren Medium Green Aluminium Alloy Folding Handle For Sale

110dB Hand Crank Air Raid Siren Medium Green Aluminium Alloy Folding and Cranking Lever Folds.
No Power Supply Required.
Compact for Portability.
Powerful Universally Recognized Sound.
Manual Hand Crank Operated Air Raid Siren.
Produces a loud adjustable sound of 110 decibels.
Made out of durable aluminium alloy.
Ideal for getting peoples attention, or rooting for your favorite team in sporting events, and many more applications.
By manually rotating the handle, the gearbox of the transmission step by step acceleration to achieve the purpose of sound, the sound depends on the rotation speed of the handle.
Specification:
Material: Aluminium alloy
Operation: Manual hand lever operated
Color: Green
Sound output: 110±2(dB)
Audio frequency: 550±20(HZ)
Transmission distance: 1000(Φm)
Dimensions
Length: 115mm/4.5"
Width: 202mm/8"
Height: 9.1"
Operation steps:1 Grab the grabbing handle in left hand and open the air door (adjust the air door according to the direction of motion to control volume of the sound);
2 Turn the rocking handle clockwise with right hand till you hear the sound
Package Included:1 x Air Raid AlarmFeatures:

• Aluminium Alloy Material: Made out of durable aluminium alloy.The handle and lever folds for easy carrying on the included waist pack.
• Specifications: dB(A)1m 110±2. Rate HZ 550±20（Depending on the hand speed. Transmission distance Φ 1000M.
• Easy To Use: By manually rotating the handle, the gearbox of the transmission step by step acceleration to achieve the purpose of sound, the sound depends on the rotation speed of the handle.
• Wide Application: Can be used for factories, families, schools, military units, flood control, disaster relief, forest fire fighting munitions, public and industrial occasions
• Portable: No power support, compact structure, easy to carry, a wide range of applications, such as the advantages of long life.

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