110dB Manual Metal Alarm Hand Crank Siren Horn Air Raid Emergency Safety Warning Siren for Fire
Aliexpress UK
Type:Hand Crank Siren Horn. 1 x Hand Crank Siren Horn. The desired alarm effect is achieved by simply manually shaking the handle clockwise at a primary speed (50-80 rpm), producing a majestic sound with a large shock and long wavelength.
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Safurance Green Aluminium alloy Crank Hand Operated Air Raid Emergency Safety Alarm Siren Home Self
Aliexpress UK
Type:LK-120 Stand Siren. 1 x Stand siren with removable bracket. The desired alarm effect is achieved by simply manually shaking the handle clockwise at a primary speed (2500 revolutions per minute), producing a majestic sound with a large shock and long wavelength.
eBay
Type:SY-200A handheld siren. 1 xHandheld Siren. The desired alarm effect is achieved by simply manually shaking the handle clockwise at a primary speed (2000 revolutions per minute), producing a majestic sound with a large shock and long wavelength.
eBay
Specifications: Type:LK-100A Handheld Siren Material: Aluminum alloy Operation: Manual hand lever operation Color:Green Sound output: 110 ± 2 (dB) Audio frequency: 550 ± 20 (HZ) Transmission range: 1000 (Φm) Height: 23 cm Outer diameter: 11.5cm Package size: 23*18.5*18.5cm Package weight: 1.9kg.
eBay
Powerful Sound:This hand operated lightweight siren produces a loud adjustable sound of 120dB powerful universally recognized sound. Working Principle: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.
eBay
Specifications: Type:LK-120 Stand Siren Material: aluminum alloy Operation: manual lever operation Color:Green Diameter of the siren: 230mm Total height: 75.5 cm Sound pressure: 125 dB +/- 2 dB Frequency: 600 Hz +/ - 20 Hz, depending on speed Transmission range: 2500 (Φm) Package size: 36.
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Type:LK-100B Handheld siren. 1 x Handheld siren. The desired alarm effect is achieved by simply manually shaking the handle clockwise at a primary speed (50-80 revolutions per minute), producing a majestic sound with a large shock and long wavelength.
eBay
Specifications: Type:LK-100B Handheld siren Material: aluminum alloy Operation: manual hand lever operation Color:Green Sound output: 110 ± 2 (dB) Audio frequency: 550 ± 20 (HZ) Transmission range: 1000 (Φm) Height: 23 cm Outer diameter: 11.5cm Package size: 23*18*18cm Package weight: 2.15kg.
eBay