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 SoundAll Integrated Into One Small But Powerful Devicebroad Compatibility: Train Electric Snail Horn Is Suitable For Almost Any VehicleWhile Its The Perfect Upgrade For Trucks, Our Horn Is Also Compatible With Suvs, Passenger Cars, Boats And Motorcycles.corrosion-corrosion Waterproofthis Loud Train Horn Are Made Of Abs Polymer Material With Strong Corrosion-resistance And Waterproof Function. Will Not Rust And Short-circuit When It Rains. It Will Not Be Cracked Due To Long-term Exposure On Sunny Days, Will Not Be Affected By Rain And Strong Light. Its Very Durable