Civil defense warning systems of factories,mining industry,residential or business area,public buliding,natural disasters. Sound Rating: 136±2dB(A)@1MElectric Motor: 15KW,380/400/440V,50/60HZIP Rating: IP55Output Frequency: 550/560±20HzNet Weight: 250kgPacking Size: 95*95*101cm Large electromechical siren