Product Description: Power Source: Operates on 36 volts, ensuring efficient performance. Screw Hole Diameters: Small hole diameter: 6mm, Large hole diameter: 8mm, allowing easy installation. Universal Fit: Designed to fit a wide range of vehicles, including Scooters/Mopeds, ATVs, Go-Karts, Vespas, Dirt Bikes, Pocket Bikes, and Motorcycles. Package Contents: Included Item: 1x Motorcycle Horn, providing a complete solution for your vehicles sound needs.