DIY Train Horn Kit for DeWalt® 20v Battery

• Complete parts kit — assemble your own cordless train horn
• Up to 140 dB output, louder than a typical vehicle horn
• Four-trumpet air horn assembly for an authentic train chord
• Built-in style air compressor included
• Pre-built wiring harness with remote receiver — no complicated wiring
• Wireless remote control in the kit
• Runs on a DeWalt® 20v battery (sold separately)
• Optional Extreme trumpet upgrade for even more output

What Makes This Kit Different

Plenty of people on a jobsite would rather build a thing than buy it finished — this kit is for them. Instead of an assembled horn, you get every component needed to put together a 140 dB quad-trumpet train horn that runs off a DeWalt® 20v battery: the four-trumpet assembly, the compressor, an air pipe, mounting screws, and a harness that arrives pre-built with the remote receiver already integrated. Follow the included steps, connect the compressor to the harness terminals, attach the trumpets and air hose, and test it with your battery. No specialty tools, no guesswork soldering — and if you mount it, the two included screws go in with the drill you already own.

Where Builders Use It

Finished builds end up everywhere: shop signals, farm and ranch gates, event kickoffs, safety alerting around equipment, or simply the loudest project on the block. Because the finished horn is battery powered, cordless, and remote-operated, you can mount it or carry it — the wireless remote fires it from a distance either way. And since it feeds off the same 20v platform as your tools, power is never more than a charger away.

Compared with bargain-bin kits, this one is engineered around power, impact-resistant durability, and clean compatibility — the harness, compressor, and trumpets are matched to work as one system the first time.

In the Box

• Air horn assembly (4 trumpets)
• Air compressor
• Pre-built harness with remote receiver
• Remote control
• Air pipe
• 2 mounting screws
• Battery sold separately — works with any DeWalt® 20v battery

DeWalt® is a registered trademark of its respective owner. We are an independent seller and are not affiliated with, endorsed by, or sponsored by the trademark owner. All references to DeWalt® are about battery compatibility only. Battery not included.