Adjustable car horn controller for DC 12V 24V systems1、16 Sound Effects Adjustable: The horn controller allows you to adjust 16 horn sounds, so you can experience different horn sounds and add a unique touch to your driving experience. 2、Enhanced Acoustics: By optimising the current transfer and ensuring stable voltage, the controller ensures that the speakers are able to produce the best sound quality, making the sound clearer and louder. 3、Circuit Protection: Equipped with overload and circuit protection, the controller prevents circuit overload or short circuits that can occur due to long time usage or for other reasons, enhances the longevity of the horn, improving its lifespan and performance. 4、Compatibility: The horn controller is fit for any 12V/24V vehicles' electric horns. This broad compatibility ensures that a wide range of vehicles can take advantage of this controller. 5、Easy Installation and Operation: This controller is quick and easy to install and operate. The straightforward setup process saves you time and effort, consequently enhancing your overall experience.