Features: 1. Train Horn for Your Truck: The Train Horn offers the loudest sound on the market, while also being the most compact Train Horn offered. 2. Fast Installation: The Train Horn is a high-quality, high-end train horn kit designed to integrate into as many trucks as possible. On top of that, the installation process takes less than an hour. 3. Innovative Design: The Horn features an extremely powerful directly injected mini-compressor paired with a patented snail design to really charge and amp up the sound! All integrated into one small but powerful device. 4. Extraordinary Equipment: There is no bulky air compressor, only a small device that produces incredible sound! Its so compact. 5. Broad Compatibility: Train Horn is Suitable For Almost Any Vehicle! While Its the perfect upgrade for trucks, our horn is also compatible with SUV, passenger cars, boats, and motorcycles. 6. Exquisite breathing design with snail performance, heat and strong. 7. Made of fine quality metal inside and ABS surface coated for a long lasting finish, strong corrosion resistance, durable and waterproof. 8. Metal terminal of horn with fine contact, no oxidation, stable characteristics and high reliability. 9. With universal mounting brackets and screws, installation is simple. 10. Universal fit for most 12V motorcycles, car, truck and boat. Specifications: Type: Vehicle Snail Horn Quantity: 1PC Material: ABS Color: Black/Red Voltage: 12V Rated power: 30W Sound: 110dB Hertz:510Hz Size: 10*9.5*7.8cm/3.93*3.73* Net Weight: 270.0g/9.52oz Frequency: 410Hz(Low Pitch) / 510Hz(High Pitch) Voltage: 12V About the sound of the speaker: Because of its structure, the snail horn will vibrate through the resonance box, and the same power will increase its sound, transmit it farther, and save electricity. Its louder and fuller sound will definitely make your car look impressive. The sound of the general electric horn is: DI, DI~ The sound of the snail horn is: BA, BA