Speaker High intensity,waterproof, dampproof and corrosion-proof shape Quality alnico,high efficiency conversion, ... Pressure:120-130dBNet WT: 2.95kgHigh intensity,waterproof, dampproof and corrosion-proof shapeQuality alnico,high efficiency conversion,high-pitched.Advamce ... power sirens.Horn series can be derectly used connecting electronic source, and with some tones, the sane as sirensFEATURES:1.OEM ...