Car horn controller with 25 sound effects for universal vehicles1、25 Sound Effects: The car horn controller features 25 different sound options, allowing you to upgrade your car horn's sound according to your preferences. 2、Volume Adjustment: Each sound option of the controller comes with its own volume level, allowing you to choose the excellent volume for any situation. 3、ABS Material: Made of high toughness plastic, the electric horn controller can withstand daily use. Its sturdy structure ensures its long lasting reliability. 4、Stylish Control Knob Design: Not only does the control knob design add a touch of sophistication to your car's interior, but it also offers a comfortable grip for effortless control. 5、Easy Installation and Compatibility: Designed for easy installation, the horn controller can easily be connected to various car horns and supports a working voltage of 12‑24V.