Material: ABSColour: Blue & WhiteSound Level: 115dBNumber of different Sounds: 18Voltage: 12VFrequency: Low 410Hz & High 510HzDimension: As the picture showFeatures£º- High quality、 easy install、 durableFor use with ANY 12 Volt Vehicle(Car、 Van、Truck、 SUV、 Motorcycle、 Yacht、 Boat、 off Road Vehicle etc)- Unique & fashion design、 have different voicesFitement:Fit for 12V Vehicle(Car、Van、Truck、 SUV、 Motorcycle、Yacht、 Boat、off Road Vehicle、 Busses etc.)Operation Guide:1.The electronic system control the horn to transform the sound2.Press the button continually for three time、 the transformation of the sound is finished.3.Repeat the above step to transform the sound continually.4.One sound will be kept until you press the button.Package Included:2x Horns2x Brackets and Screws1x Controller Relay