Feature:1. It has a wide range of applications and is suitable for all 12V vehicles, such as cars, ships, trucks, tractors, vans, etc. It is also very suitable for motorcycles or boats.2. The 4 trumpet air horn gives a loud and powerful warning. The huge roar can attract everyone's attention and is heard all around. The small air horn compressor kit will produce a powerful 150DB sound. Improve the safety of family and driver travel.3. The 12 volt DC power compressor can be installed in almost any position of the vehicle. Ideal for truck or van owners who want to bring noise in a way that stands out both in sound and appearance.4. The horn kit includes basic installation hardware, hoses, and you don't need to purchase them separately for installation.5. The air horn kit is easy to install. It is flexible and portable, so you can easily transfer from one car to another vehicle.Specification:Item Type: Air Horn KitMaterial: Stainless SteelSwitch Battery: Built-in Button battery CR2032 220mAhHow to Use: 1. Connect the air pump to the car power supply.2. Connect the air horn to the air pump.3. Connect the switch wire to the air horn.4. Then you can use it.General: Type: Full SystemTrumpet/Horn: Trumpets Total: 4pcsSound Type: TrainPower: 12 VoltsConstruction: MetalColor: ChromeMounting Hardware: Bolts, Nuts, Rubber GasketDimensions (L X D): Approx. 13-in, 11-in, 9-in, 7-in x 3-inOverall Dimensions (L X W X H): Approx. 14in x 6-in x 6-inCompressor: Power: 12 VoltsColor: ChromeMaximum Pressure: 200 PSIDuty Cycle (100 PSI): 100%Maximum Current Draw: 23AmpFlow Rate (0 PSI): 1.7 CFMSealed: NoMaintenance Free: YesDimensions (L X W X H): Approx. 10-in x 4in x 6-inAir Tank: Capacity: 3 GallonWorking Pressure: 200 PSIMaterial: SteelColor: BlackTotal Ports: 7Front: Approx. 1 x in, 1 x inBottom: Approx. 1 x inLeft Side: Approx. 3 x inRight Side: Approx. 1 x inTrumpets: Approx. 13-in L, 11-in L, 9-in L, 7-inL x 3-in DOverall: Approx. 14in L x 6-in W x 6-in HAir Compressor: 200 PSI Air Compressor12V Permanent Magnetic MotorMaximum Working Pressure: 200 PSIDuty Cycle: 100% at 100 PSIAmperage Draw: 23AFlow Rate: 1.7CFM at 0 PSICapacity: 3 Gallon (12 Liter)Pressure Rating: 150 PSI, maximum 200 PSI7 Ports: Approx. 6 x in NPT, 1 x in NPT.Package List:1 x 3 Gallon Gas Tank1 x in NPT Airfoil Drain Valve1 x in NPT compression fitting for in OD air line1 x in NPT Hex Head Male Plug1 x in NPT Hex Head Male Plug1 x 250 PSI Safety Valve1 x 170-200 PSI Pressure Switch1 x in OD Nylon Plastic Hose (6ft)1 x 12mm Thread Sealing Tape (16ft)1 x Air Pressure Gauge1 x Horn Button1 x Horn Assembly1 x Pump1 x Controller10 x Screw8 x Nut1 x 30A Insurance Film2 x Fuse Sleeve1 x Insurance Card Holder8 x Gasket4 x Washer1 x Sealing Ring1 x Manual2 x Base4 x Cable TieNote:The product needs to be installed horizontallyplease don't install inverted or inclined.