dc12v red twin tone air blast electric horn car loudspeaker steam whistle relay<br /><br />? specification<br />color:red<br />sizeapprox.:91.6mm/3.6”l x 109.9mm/4.32”w x 150mm/5.9”h<br />detail size as shown in the picture<br />material:plastic and metal<br />voltage:dc 12v<br />relay voltage:dc 12v30a<br />fundamental frequency:530hz÷5%<br />sound pressure level at 2m:?115dba<br />sound pressure level at 4m:?139dba<br />reliability:100，000 on/off cycle<br />type of sound:harmonized twin tone<br /><br />? feature<br />1.100%  and high quality.<br />2.it is durable and convenient.<br />3.simple user instruction and easy to use.<br />4.it can replace you pickup truck， van， boat air horn.<br /><br />? note:<br />1.we provide clear pictures， measurements where possible. please check as much as possible to make sure the item is the one that you need.<br />2.please allow 0.5-1 inch difference due to manual measurement.1 inch=2.54cm<br />3.the color of the actual items may slightly differentthe listing images due to different computer sn， thanks for your understanding.<br />4.instruction is not included.<br /><br />? package included:<br />1x horn<br />1x relay<br />some install fittings