Feature: 1. Long transmission distance of 125dB sound, enhance maximum driving safety. 2. Dual trumpet air horn, directly connect to the power supply to use, fits for all vehicles and ships with air source equipment. 3. With a shiny surface, the air horn cast a striking appearance on any vehicle mounted. 4. Manufactured from premium stainless steel material, wear‑resistance and corrosion‑resistance, durable and sturdy. 5. Professional manufacturing, stable performance, high sensitivity and long service life. Specification: Condition: 100% Brand New Item Type: Air Horn Material: Stainless Steel Color: SilverTrumpet Height: Approx. 395mm/15.6in, 465mm/18.3inDiameter: Approx. 103mm/4.1inVoltage: DC 12V Current: 8.0A Sound Level: 125dB Frequency: 420HzCommon Trouble Shooting of Car Horn:- Car horn is a device frequently used in driving. If the horn fails, it will be inconvenient to drive. When the horn button is pressed on the steering wheel or other position, the current from the battery will flow through the loop to the electromagnetic coil of the horn relay. When the electromagnetic coil draws the relay moving contact switch to close, the current will flow to the horn. The electric current causes the electromagnet inside the horn to work, causing the vibrating membrane to vibrate and produce sound. - In many of the problems with the speaker, the problem is usually the fault of the speaker itself. In particular, there are some defects in the installation position of horn designed by some car. When it rains, it is easy to make the horn get wet by rain, causing damage to the horn. You can refer to the following steps when a failure occurs.Sometimes does not ring the horn switch, if the horn sometimes ring, sometimes does not ring, is the horn switch internal contact is not good, some is also the horn itself problem. - The scratchy sound is mostly due to the poor contact of the plug, especially each contact around the steering disc, which is easily worn due to frequent use. - First check the fuse to see if it fuses, then unplug the horn plug and use a multimeter to measure whether there is electricity when the horn switch is pressed. If there is no electricity, check the horn harness and relay. If there is electricity, it is a problem of the horn itself. At this time, you can also try to adjust the adjusting nut on the horn to see if it can sound. If it still doesn't sound, you need to replace the horn. . Package List: 1 x Dual Trumpet Air Horn3 x Mounting Screw3 x Fixing Nut9 x Gasket2 x Foam Pads Note: ‑ Solenoid valve air pipe joint should be carefully tightened, sometimes blocked by the filter net in use, and should be always cleaned so as not to affect sound quality.‑ No Installation Instructions Included, professional installation is recommend.‑ This kit may require additional parts such as wiring, relays, switch, and hardware.‑ Each installation is custom depending on the application.