Voltage: 12-24V Customizable Sound Effects: With multiple different sound options, the Car Horn Sound Effect Controller allows you to personalize your car horn's sound. Adjustable Volume Levels: Each sound effect comes with its own volume level, giving you the flexibility to choose the perfect volume for any situation. High-Quality: Crafted from high-quality plastics, this controller is built to withstand the rigors of daily use. Its sturdy construction ensures long-lasting durability. Easy Installation and Compatibility: It is designed for hassle-free installation and can be easily connected to various car horns, supports a working voltage of 12-24V. Color: As Shown Material: Plastic Package Contents: 1 * adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +- 1-3cm.