Train Horn for Your Truck: TheTrain Horn offers the loudest sound on the market, while also being the most compact Train Horn offered. Fast Installation: The Train Horn is a high-quality, high-end train horn kit designed to integrate into as many trucks as poible. On top of that, the installation proce takes le than an hour. Innovative Design: The Horn features an extremely powerful directly injected mini-compreor paired with a patented snail design to really charge and amp up the sound All integrated into one small but powerful device. Extraordinary Equipment: There is no bulky air compreor, only a small device that produces incredible sound It's so compact. Broad Compatibility: Train Horn is Suitable For Almost Any Vehicle While It's the perfect upgrade for trucks, our horn is also compatible with SUV, paenger cars, boats, and motorcycles. Exquisite breathing design with snail performance, heat and strong. Made of fine quality metal inside and ABS surface coated for a long lasting finish, strong corrosion resistance, durable and waterproof. Metal terminal of horn with fine contact, no oxidation, stable characteristics and high reliability. With universal mounting brackets and screws, installation is simple. Universal fit for most 12V motorcycles, car, truck and boat. Voltage: 12V Frequency: 410Hz(Low Pitch) / 510Hz(High Pitch) 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 impreive. The sound of the general electric horn is: "DI, DI~" The sound of the snail horn is: "BA, BA" Fuller sound and longer life Colour: Black+ Red Material: Metal Package Contents: 1/2 * Electric Snail Horn Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.