?Durable Aluminium Alloy?: Made out of durable aluminium alloy.The handle and lever folds for easy carrying on the included waist pack.
?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.
?Powerful Sound?: This hand operated lightweight siren produces a loud adjustable sound of 110dB powerful universally recognized sound.
?Portable?: No power support, compact structure, easy to carry, a wide range of applications, such as the advantages of long life.
?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.