Product Feature Super Loud Train Horn for Your Truck: The Super Loud Train 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 possible. On top of that, the installation process takes less than an hour. 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. Extraordinary Equipment: There is no bulky air compressor, 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, passenger cars, boats, and motorcycles. Product Specification Type Super Train Horn Color Red Power Supply Voltage 12 (V) Power 30 (W) Sound Level 110-130 (DB) Current 2 (A) Working Temperature 25 (℃) Voice Coil Copper Diaphragm Material Plastic Size Single 9x9cm (error +-1cm) Package Included 1 X Super Train Horn