Biltek 12V Dual Air Horn Kit Trumpet Freight Train Car Truck Boat RV Super-Loud 135 dB Dual Trumpet SUPER-LOUD Air Horns Provides a Powerfully Loud Freight Train Sound Works on any 12 Volt Vehicle including Cars, Trucks, Vans, Motorcycles, Buses, and Boats Twin Horns with High/Low Tones Combine for one HUGE Sound Brand: Biltek | Super-Loud 135 dB sound can not be ignored WARNING: This horn has been mistaken for a real train horn. Do not use near train tracks.