The content is only used to understand the product reference description, please do not quote directly 2PCS 300 DB Super Train Horn for Trucks,Electric Snail Horn, Loud Air Electric Snail Double Horn Raging Sound for Trucks, Cars, Motorcycle, Bikes Boats with 12v Power Supply 300DB Train Horn for Your TruckOur 300DB(2*150DB) Train Horn offers the loudest sound on the market, while also being the most compact Train Horn offered. Dual tone loudlyThe internal reflux design, up to 300DB loudness, gives you a loud voice to warn others, and provides a certain degree of safety for driving. Our 12V snail horn can help you reduce unnecessary injuries. Innovative Design: Our Horn features an extremely powerful directly injected mini-compressor to really charge and amp up the sound! All integrated into one small but powerful device! Broad Compatibility: Train Horn is Suitable For Almost Any Vehicle! While It s the perfect upgrade for trucks, our horn is also compatible with SUVs, passenger cars, boats and motorcycles. Waterproof MaterialABS polymer material, strong corrosion resistance,waterproof product,It won t get rusty and circuit short when it is raining. Product description: Description: 1.Compact Design. 2.300DB Sound Volume, The Most Powerful on The Market! 3.Loud, Clear and Deep Train-Like Sound. 4.Simple Installation. 5.Complete Water and Weather Resistance. Specification: Voltage: 12V Frequency: low 410HZ high 510HZ Hz Sound level: 300 dB Power: approx. 48 W PACKAGE INCLUDES: 2 X 150 DB Super Train Horn For Trucks 2 x Sheet Iron 2 x Screw Hat Note: 1. Due to the difference between different displays or display lighting, our products may have a little color difference. 2.Due to manual measurement, please allow an error of 1-3mm.