300DB Train Horn for Your Truck: The 300DB Train Horn offers the loudest sound on the market, while also being the 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 , the installation process takes less than an hour. Innovative Design: The Horn features an extremely directly injected mini-compressor paired with a patented snail design to really charge and amp up the sound! All integrated into one small but device. Extraordinary Equipment: There is no bulky compressor, only a small device 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 with SUV, passenger , boats, and motorcycles Specifications: About 150DB for each; 1 Pair=300DB Loudness coefficient: 300DB Technical support: Vehicle : 12V E mark rating: HIGH 510HZ Single speaker size: diameter: approx.9 cm ; depth: approx.9 cm Colour:Black+red Material:ABS+metal Package Contents: 1 Pair * Snail Horn(With accessories) Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.