Features DurablePortableGood sound no VibrationHigh The temperature and pressure changes Suitable for Cars trucks Boats motorcycles 12 V vehicleSimple Installation operation Does Not Require Compressor or Hoses and is Maintenance Free Low current high decibel This Horn has good sound and extremely stable Frequency Specification Material All MetalColor ChromeType Short tube Long tubeSound 126DBVoltage 12VWeight 817g 828g Note No Installation Instructions IncludedEach installation is custom depending on the application Professional installation is recommend Common Trouble Shooting Of Car Horn 1 If the horn is sometimes loud or sometimes not the contact inside the horn switch is usually not good and some are problems of the horn itself 2 The scratchy sound is mostly due to the poor contact of plug especially each contact around the steering wheel which is easily worn due to frequent use 3 No noise at all First check the fuse to see if it fuses then pull 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 doesnt sound you need to replace the horn Package Included 1 x Air Horn