Description: Car Horn Controller: The Car Horn Controller features a variety of different sound options that allow you to personalize the sound of your car horn, This feature makes it an ideal accessory to enhance your experience.Adjustable Volume Level: The electric horn speaker has its own volume level for each sound effect, with multiple sound options, giving you the flexibility to choose the volume for any situation.Easy to Use: Sound Control Unit, you can easily switch the speaker sound, simple and convenient, compact size, will not take up too much space.Material: The Electric Horn Speaker is made of pp material, which is wear resistant and durable, can be used for a long time, and can withstand daily use.Easy to Install: Car Horn Controller can be easily connected to various car speakers and supports 12 to 24V working voltage, suitable for different vehicle types. Specification: Voltage: 12-24V Size Chart: Approximate size:10cmx5cmx3cm/3.94inchx1.97inchx1.18inch Package Includes: 1 Car Horn Controller Note: Please allow slightly errors due to manual measurement and different monitors.