Search "Milwaukee train horn" or "DeWalt train horn" and you'll find hundreds of listings — but open Milwaukee's or DeWalt's own catalogs and there isn't a horn anywhere in them. Here's the straight answer on who actually builds battery train horns, and what those brand names on the listings really mean.
The short answer: neither Milwaukee nor DeWalt makes a train horn
Milwaukee Tool has never cataloged an air horn or train horn. The company describes its M18 cordless line as having "over 200 performance-driven solutions" — drills, saws, lights, jobsite speakers, inflators, even heated jackets — and a horn is not one of them. Same story at DeWalt: the 20V MAX system advertises "300+ 20V products and growing," and not a single one of them is a horn of any kind.
The closest either brand gets to making noise on purpose is a Bluetooth jobsite speaker. Both platforms include audio gear, inflators, lights, and fans, but neither has ever shipped a horn, a siren, or any warning-signal device — it's simply not a market they've entered.
That means every "Milwaukee train horn" or "DeWalt train horn" you see on eBay, TikTok, or a Google Shopping carousel was built by someone other than Milwaukee or DeWalt. It didn't come out of either company's factory, and neither brand designed, authorized, or endorses it. If a listing implies otherwise, walk away — that seller is being loose with the truth, and probably with other details too.
Who actually builds battery train horns
Battery train horns — often called horn guns because of their drill-style pistol grip and trigger — are built by small independent manufacturers, most of them US-based shops that assemble and ship from the States. We're one of them. The builder engineers the whole noise-making side of the device: the trumpets, the air delivery, the trigger, and the electronics for a wireless remote if the model has one.
The one thing the builder doesn't reinvent is the power source. Instead of designing a proprietary battery (and forcing you to buy and babysit yet another charger), the horn is built with a battery interface that accepts a tool pack you likely already own. Our 5-Trumpet Horn Gun for Milwaukee® 18V Battery is a good example: it's a self-contained five-trumpet horn that slides onto the Milwaukee M18 pack you already run in your drill, and it fires the moment you pull the trigger.
To be crystal clear about the relationship: Milwaukee® and DeWalt® are registered trademarks of their respective owners. Companies like ours build products that are compatible with those battery platforms — we are not affiliated with, sponsored by, or endorsed by either brand. Any reputable horn builder states this plainly on its site.
Why the brand names get attached anyway
If Milwaukee doesn't make the horn, why is it called a "Milwaukee train horn"? Because in the cordless world, the battery platform is the product's identity. Nobody wants a sixth charger on the garage shelf. When you already own three M18 packs for your drill and impact driver, "works with the batteries I already have" is the single most important spec — so sellers put the platform right in the product name, the same way you'd shop for a "DeWalt-compatible LED work light."
Horn guns follow the same convention across all the major battery ecosystems. Depending on the builder, you'll find versions for:
- Milwaukee M18
- DeWalt 20V MAX
- Ryobi ONE+
- Makita LXT
- Bosch 18V
- Ridgid 18V
- Craftsman V20
- Bauer, Hart, Hercules, and Kobalt
In every case the naming means exactly one thing: the horn's battery slot fits that brand's pack. It says nothing about who made the horn. That's also why you won't find these horns on milwaukeetool.com or dewalt.com, and why a Home Depot or Lowe's tool aisle doesn't stock them — they live in independent builders' stores and marketplaces instead.
How loud these get compared with a real train
Since no OEM spec sheet exists, loudness claims come from the horn builders themselves — and it helps to have a fixed reference point. A real locomotive horn is federally regulated: under 49 CFR 229.129, a lead locomotive's horn must produce between 96 and 110 dB(A) measured 100 feet in front of the locomotive.
Battery horn guns are rated close to the source rather than at 100 feet, which is why you'll see bigger numbers on product pages — our loudest configurations reach up to 150 dB near the horn. Distance shrinks any horn's number fast (roughly 6 dB for every doubling of distance), so a 150 dB horn gun and a locomotive land in the same conversation, not the same room. We break down the honest math in our train horn decibel chart.
Trumpet count is the main loudness lever between models. Dual-trumpet horns are the compact entry point, quads add volume and a fuller chord, and five-trumpet builds sit at the top. On the DeWalt side, for example, the DeWalt Air Horn Gun with 5 Trumpets and Remote pairs the biggest trumpet array with a wireless remote so the horn can fire from a mount while the fob rides in your pocket.
Does a third-party horn affect your batteries or tools?
No. A horn gun is a standalone device — your pack clicks on and off exactly the way it does on a drill, with no adapters, no rewiring, and no modification to the battery. Your tools never enter the picture; the horn only borrows the pack. When you're done honking, the same battery goes right back on your impact driver.
Draw-wise, a horn blast is a short burst, so a single charged pack delivers hundreds of blasts before it needs the charger — higher-Ah packs stretch that further. We've published full numbers by amp-hour rating in our blasts-per-charge runtime guide.
FAQ
Has Milwaukee ever sold an air horn or train horn?
No. The M18 platform spans over 200 tools and accessories, and none of them is a horn or signaling device. Anything sold as a "Milwaukee train horn" is a third-party product built to run on M18 batteries.
Does DeWalt make an air horn?
No. DeWalt's 20V MAX lineup covers 300-plus products — drills, saws, nailers, outdoor equipment — with no horn among them. "DeWalt train horn" always means a DeWalt-battery-compatible horn from an independent builder.
Are battery train horns endorsed or approved by Milwaukee or DeWalt?
No. Horn builders are independent companies with no affiliation to either brand. The brand names appear in product titles only to tell you which battery pack fits.
Do I need to own a Milwaukee or DeWalt tool to use one?
No — you only need the battery. A horn gun is fully self-contained; if you buy a pack and charger just for the horn, it works exactly the same as it does for someone with a truck bed full of tools.
Should I buy the Milwaukee version or the DeWalt version?
Buy the version that matches the batteries already in your garage — that's the entire point of the platform system. If you own both (or neither), pick based on pack prices and the configurations offered for each platform.