2 Type Loud Air Horn Universal Car Signal Horn For Auto Vehicle Car Truck Siren Megaphone Alarm Waterproof Snail Speaker HornFeatures- Easy install, durable - Unique fashion design, have different voices - Please check the size carefully before you purchase. - For use with any 12 volt vehicle(car, van,truck, SUV, motorcycle, yacht, boat, off Road vehicle etc)Selling point-Long life reliable quality -Mutil tone or single sound -New pure copper new ABS -Universal car horn fits for most Cars,Trucks,Tractors,VAN,Agricultural mechinery,SUV,Scooters/Mopeds,ATVs,Go-Karts,Vespas,Dirt Bikes,Pocket Bikes and MotorcyclesOur Advantages-Guarantee the quality and the quantity -Reasonable prices -Short production time -Satisfactory after-sales servicespecificationMaterial: ABS Colour: Blue white Sound Level: 110 + 5 dB Voltage: 12V Frequency: Low 410Hz high 510HzOperation Guide- The electronic system control the horn to transform the sound - Press the button continually for three time, the transformation of the sound is finished. - Repeat the above step to transform the sound continually. - One sound will be kept until you press the button.Wiring method- The red line is connected to the 12V positive pole. - The black wire is connected to the negative pole of 12V voltage. - The blue wire is connected to the horn controllerPackage Including2x Horns 2x Brackets and Screws 1x Controller Relay (Black horns haven t relay, just the blue horns have relay)Note:Black horns haven t relay, just the blue horns have relay !!!