1 Quartz crystal produces the signal source whose frequency is extremely stable <br />2 Non-contact, long lifespan<br />3 Good sound quality, free from vibration, low temperature, high temperature, voltage change impacts <br />4 Multiple voices can reach dozens of sound<br />5 Simple installation, single-wire controls to convert various sounds without need additional accessories<br />Color: black + silver<br />Material: metal<br />Packing size: about 32 x 17 x 17 cm<br />Product size: about 28.6 x 15.5 x 15.5 cm<br />Horn diameter: about 9 cm<br />Horn length: about 12.7/19/25.5 cm<br />Working voltage: DC 12V/24V<br />dB output: 150.2 dB<br />Support air brake lorries, buses etc that have blast pumps not oil brake vehicles that have no blast pumps.<br />1 x Air Horn<br />In original package ( with filled bubble bag )<br /><img src="http://img6.eachbuyer.com/x9/p100/bv344_1.jpg" / noproxy>                                                        <img src="http://img6.eachbuyer.com/x9/p100/bv344_2.jpg" / noproxy>                                                        <img src="http://img6.eachbuyer.com/x9/p100/bv344_3.jpg" / noproxy>                                                        <img src="http://img6.eachbuyer.com/x9/p100/bv344_4.jpg" / noproxy>                                                        <img src="http://img6.eachbuyer.com/x9/p100/bv344_5.jpg" / noproxy>                                                        <img src="http://img6.eachbuyer.com/x9/p100/bv344_6.jpg" / noproxy>