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.