300DB Train Horn for Your Truck: The 300DB Train Horn delivers a powerful sound, designed to be one of the most compact train horn options available. Fast Installation: This high-quality train horn kit is built for broad vehicle compatibility. The installation process takes less than an hour. Innovative Design: The horn includes a high-performance mini-compressor combined with a unique spiral design to enhance sound output. All components are integrated into a compact and efficient unit. Extraordinary Equipment: No large air compressor is required—just a small, efficient device that produces strong sound output. Its design is space-saving and effective. Broad Compatibility: Suitable for a wide range of vehicles. Ideal for trucks, and also compatible with SUVs, passenger cars, boats, and motorcycles. Exquisite design with spiral sound chamber for enhanced performance, heat resistance, and durability. Constructed with high-quality metal interior and ABS surface coating for long-lasting finish, corrosion resistance, durability, and waterproof performance. Metal terminals ensure reliable electrical contact, prevent oxidation, and provide stable performance. Includes universal mounting brackets and screws for easy installation. Universal fit for most 12V vehicles including motorcycles, cars, trucks, and boats. Voltage: 12V Frequency: 410Hz (Low Pitch) / 510Hz (High Pitch) Weight: 260g per piece About the sound of the speaker: Due to its structural design, the spiral horn uses resonance to amplify sound, allowing for greater sound projection and improved efficiency. Produces a louder and richer tone, enhancing vehicle presence. Compared to standard electric horns that produce a "DI, DI~" sound, this horn delivers a deeper, fuller tone. Offers richer sound and extended service life. Color: Black + Red Material: Metal Actual sound level: 105-115 dB Package Contents: 2 * Electric Spiral Horn Note: Light and display settings may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.