SUPER LOUD 4 TRUMPET TRAIN HORN - Each trumpet has been tuned to produce sounds at different frequencies, when the sounds are combined you will have the highly recognized train horn sound with a rich, full and deep tone, capable to catch immediately everyone's attention while making sure distracted drivers are aware of your presence. Check the images for a sound clip video METAL CONSTRUCTION - Trumpets are made with premium quality zinc alloy which has been powder coated in black color for an additional layer of protection, tough enough to withstand any weather condition 12V FAST RESPONSE SOLENOID - A heavy duty air valve that will allow the air to enter the horn when it becomes electrically energized. This valve comes with a compression fitting to connect the included air hose, a type of fitting that is more efficient holding the air hose at high air pressures EASY TO INSTALL - Horn can be easily installed in your vehicle and your existing air system with the included complete mounting hardware, durable 6-ft Nylon hose and clear instructions. Onboard air system (air tank & compressor) required to operate - NOT INCLUDED PREMIUM QUALITY & BEST VALUE FOR MONEY - This horn was designed to ensure it lasts many years with daily use. A 1-year warranty is provided for all its parts. We strived to keep it affordable compared to the exceptional quality This powerful quad trumpet air horn produces a loud roaring sound. Black color, made entirely of metal for maximum protection against all weather conditions. Horn comes with a 12V solenoid, hose and mounting hardware. An on-board air system is required for operation. Ideal for all vehicles with a 12V system. This horn is sure to draw all the attention you are looking for. Quad Trumpet Train Air Horn (Black) Metal Construction 12V Electric Air Valve (Solenoid) with Compression Fitting ¼" OD Nylon Plastic Hose (6 Feet) Mounting Hardware Included Dimensions: Trumpets: 13-¾" L, 11-½" L, 9-¼" L, 7-¾" L x 3-¾" D Overall: 14" L x 6-¾" W x 6-½" H Note: Onboard Air System Required