DIY Train Horn Kit for DeWalt® 20v Battery
Assembled in the USA using a genuine BossHorn impact driver housing and custom-engineered components with domestic and imported parts. Just insert your battery and it's ready to blast.
⚠ WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more info: P65Warnings.ca.gov
DIY Train Horn Gun Kit with 4 Trumpets for DeWalt® – Up to 140 dB
Build your own 140 dB cordless train horn with this complete DIY kit for DeWalt® drills. Featuring quad trumpets, a built-in compressor, and a remote control system, this kit gives you everything needed to turn your impact drill into a powerful, attention-grabbing horn. Perfect for events, safety alerts, outdoor adventures, or just having fun.
Key Features
- Compatible with DeWalt® Drills – Works with most DeWalt® impact drill models, plus many other brushless drills.
- 140 dB Loudness – Creates an incredibly powerful blast, louder than most vehicle horns.
- Quad Trumpets – Delivers a bold, authentic train horn sound.
- Wireless Remote Control – Operate your horn from a distance with ease.
- Extreme Trumpets Upgrade – Optional upgrade available for even more sound power.
What’s Included in the Kit
- Air horns assembly (4 trumpets)
- Air compressor
- Pre-built harness with remote receiver
- Remote control
- Air pipe
- 2 mounting screws
How to Build Your Train Horn for DeWalt® 20v Battery
- Open the drill shell and remove gears, motor, and harness.
- Fit the shell to match the air compressor.
- Install the new harness and connect the compressor to terminals.
- Attach your DeWalt® battery and test the compressor.
- Reassemble the shell and drill two mounting holes.
- Install the horn mount with bolts and connect the air hose.
- Enjoy your powerful new train horn!
Why Choose This DIY Kit?
Unlike cheap alternatives, this kit is engineered for power, durability, and compatibility. It comes with everything you need to build a high-performance cordless horn from your DeWalt® impact drill—no extra tools or complicated wiring required. Just follow the steps and enjoy instant results.
Order your DIY Train Horn for DeWalt® 20v Battery Kit today and create a 140 dB blast that everyone will hear.
Fully Assembled. Ready to Blast.
Arrives pre-built as a complete tool — just snap in your battery and hit the remote.
Unbox & Snap In Your Battery
Arrives fully assembled — a complete tool, not a kit. Just insert a matching battery and you're good to go.
Trigger or Remote — Your Call
Pull the trigger on the tool itself, or blast from a distance with the included wireless remote (up to 300ft). Long-range 2,000ft remote also available.
Instant Blast
No delay, no warm-up — real train horn sound the moment you press. Three loudness levels for any task: Dual, Quad, and Extreme.
Real train sound. In one hand.
"Your neighbors' car alarm just became the second loudest thing on the block"
Patent Pending Technology
Volume Control
3 adjustable levels
Overheat Protection
Auto shut-off at 185°F
Battery Protection
Prevents deep discharge
See It. Hear It. Want It.
Works With Any M18™ Battery
Your BossHorn runs on standard Milwaukee® M18™ batteries — the same ones powering millions of M18™ tools worldwide. No proprietary battery, no lock-in. Pick any capacity from 2.0Ah to 12.0Ah. The higher the Ah, the more blasts per charge. Already own M18™ tools? You're ready to go. New to the platform? M18™ batteries start at $30 and work across 200+ tools.
See the Difference
Same price range. Completely different league.
| Feature | Boss Series | Others |
|---|---|---|
| Price | $365 | $355 |
| Sound Output | 150 dB | 130 dB |
| Perceived Volume | 4x louder | 1x |
| Trumpets | 4 (tuned) | 2 |
| Remote Range | 300 ft (2,000 ft avail.) | 160 ft |
| Remotes Included | 1 | 0 (extra cost) |
| Volume Control | ✓ 3 Levels | ✗ |
| Overheat Protection | ✓ | ✗ |
| Battery Protection | ✓ | ✗ |
| Built in USA | ✓ | Unknown |
| Warranty | 1 Year | ✗ |
| Return Policy | 90 Days | 30 Days |
Technical Specifications
Sound
Remote Control
Power System
Construction
Where to Use It
Sporting Events
Electrify the stadium. When your team scores, the entire parking lot will know.
Tailgating
The ultimate party starter. Remote-trigger from your lawn chair. Be the legend.
Trucks & Off-Road
Mount it or hand-hold. Louder than any factory or aftermarket horn on the road.
Boats & Marine
Fog signal, dock arrival, or just pure fun on the water. Audible for a mile.
Camping & Hiking
Bear and wildlife deterrent. Recommended by outdoor experts for backcountry safety.
Emergency Signaling
Audible up to 1 mile. Alert rescue teams when every second counts.
Construction Sites
Shift change signal, safety alerts, or just getting everyone's attention. Fast.
Content Creation
Prank videos, reaction content. This is your viral moment on TikTok & YouTube.
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