Feature: 1. Customizable Sound Effects: With 15 different sound options, the Car Horn Sound Effect Controller allows you to personalize your car horn\u0027s sound. 2. Adjustable Volume Levels: Each sound effect comes with its own volume level, giving you the flexibility to choose the perfect volume for any situation. 3. 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. 4. Digital Display: Equipped with a digital display, it shows the current gear in real time for easy viewing. It also detects the decibel level when the speaker is working, adding additional functionality. 5. 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. Specification: Features: Customizable Sound Effects: With 15 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. Digital Display: Equipped with a digital display, it shows the current gear in real time for easy viewing. It also detects the decibel level when the speaker is working, adding additional functionality. 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. Specifications: Type: With Horns / Without Horns(optional) Material: Plastics Voltage: 12-24V Horn Decibel: 110dB each, 220db one pair Controller Size: 93 * 52 * 30mm/ 3.7 * 2.0 * 1.2in Horn Size: 90 * 90mm/ 3.5 * 3.5in Package Size: With Horns: 200 * 150 * 50mm/ 7.9 * 5.9 * 2.0in Without Horns: 120 * 90 * 78mm/ 4.7 * 3.5 * 3.1in Package Weight: With Horns: 600g/ 21.2oz Without Horns: 95g/ 3.4oz Note: The horns are only suitable for 12V vehicle, the horn controller is suitable for 12-24V vehicle. Packing List: 1 * Horn Controller 2 * Horn Package List: 1 * Horn Controller 2 * Horn