This horn is made of fine-quality abs plastics, which make it more practical. A perfect horn with beautiful appearance, which is also loud.<Br/>features:<br />suitable for vehicles with a compressed air brake system. <Br />this horn guarantees the attention needed in critical situations as they add a level of safety to your driving with 135db of sound. <Br />made of fine quality metal inside and abs surface coated in black color for a long lasting finish.<Br />fine contact and simple to install.<Br />loud and clear sound.<Br />low power consumption and fine performance.<Br/>specifications:<br />material: abs and metal<br />color: black<br />voltage: 12v/24v <br />volume level: 135db<br />operation air: 0.5Mpa-0.8Mpa <br />current: 4.0A <br />size: 210 * 160 * 110mm / 8.3 * 6.3 * 4.3In<br />weight: 700g / 1.54Lb<br />package size: 250 * 180 * 150mm / 9.8 * 7.1 * 5.9In<br />package weight: 800g / 1.76Lb<br/>packing list: <br />1 * truck air horn