VEVOR's 4-trumpet train horn kits are some of the cheapest complete air setups you can buy. Every listing is labeled 150 dB, and the entry kit costs about $90. Here's what each VEVOR kit includes, what the 150 dB figure actually tells you, and what the kit costs once it's wired into a truck. Then we compare it with a battery train horn that needs no install.
The Three VEVOR Kits and What's in the Box
VEVOR sells the same basic package in three tank sizes. Each kit comes with four trumpets, a solenoid valve, a 12V compressor, an air tank, air line, mounting screws and bolts, and fuses. Here are the prices and specs from VEVOR's US listings as of 11/09/2026:
| VEVOR kit | Tank | Compressor | Pressure switch (on / off) | Listed price |
|---|---|---|---|---|
| HS-550 | 0.8 gal (3 L) | 12V, 170 W | 90 / 120 PSI | $89.90 |
| HS-660 | 1.6 gal (6 L) | 12V, 190 W | 90 / 120 PSI | $107.90 |
| HS-1000A | 2.6 gal (10 L) | 12V, 280 W | 110 / 160 PSI | $167.90 |
VEVOR rates all three kits at 150 dB, even though the compressors and tank pressures are different. Some size options showed as out of stock on VEVOR's own site when we checked. VEVOR also has a separate 6 L kit listed at $125.99, with a pressure switch set to 95 / 125 PSI. Prices change often, so check the listing before you buy.
The bigger issue is what isn't in the box. All three listings say the power switch and power cord are not included, and none of them list a relay or a horn button. Several reviewers on VEVOR's own review pages say they had to buy the relay, switch, and wire separately. That's the same problem we found with the cheaper listings in our look at whether cheap Amazon train horns are worth it.
Is the VEVOR Kit Really 150 dB?
VEVOR's listings don't say what distance the 150 dB was measured from. That matters more than any other detail on a dB rating, because sound level drops fast as you move away from the source. The Federal Highway Administration's noise barrier design guidance puts the drop for a point source at about 6 dB every time the distance doubles. Going from 4.5 inches to 3 feet is three doublings (4.5 to 9 to 18 to 36 inches), so a reading taken a few inches from the bell can come out about 18 dB higher than the same horn measured at 3 ft. A rating with no distance can't be checked against anything.
Even HornBlasters, which sells high-end air horn systems, says on its site that many horn ratings are taken at unrealistic distances or not tested at all. It says a believable rating needs a calibrated meter and a stated distance such as 3 ft or 100 ft. One independent review site that tracks budget kits estimates the VEVOR at a realistic 130 to 135 dB at 3 ft. That figure is the reviewer's estimate, though, not a measurement.
The fair way to read this: treat every "150 dB" figure, ours included, as a rating at the source, not a measurement you'll hear 50 ft away. Our tiers are rated at 130, 140, and 150 dB, and they only work for comparing like with like. Our article Is a 150 dB train horn real? covers how to read these numbers. Compared on the same at-source basis, a four-trumpet VEVOR kit and a quad battery horn are in the same loudness class. The real differences are what it takes to make each one work and how easily you can move it.
What the Install Actually Takes
VEVOR says no special tools are needed, and that's true. The job still involves more than bolting on the horn:
- Mount the compressor and tank. VEVOR's Q&A tells buyers to mount the compressor horizontally, because other orientations shorten its life. It also recommends a dry, well-ventilated spot. None of the listings give a waterproof (IP) rating.
- Build the wiring yourself. VEVOR's own support answer for the 2.6 gal kit lays out a relay circuit: the compressor runs through relay terminals 30 and 87 with a fuse to battery positive, and the coil is switched through the pressure switch from ignition ACC. You supply the relay, the wire, and the switches. For comparison, Vixen's ready-made compressor and horn wiring kit is $47.78 and includes 16 ft of 10-gauge wire and a 40 A relay.
- Add switches. One reviewer recommends a separate switch for the compressor, because otherwise it can drain the truck battery when the engine is off. Another installed a compressor switch and a momentary horn button using 14-gauge wire.
- Plumb and seal the air lines. Reviewers mention short hoses, a hose that didn't match the horn fitting, and a fitting that leaked on the horn side. The kit includes rubber pads to cut down vibration, and one owner added extra rubber isolators.
- Drain the tank. Each tank has a drain plug, because compressed air leaves water in the tank that has to be drained out.
Current draw is the other thing to plan for. VEVOR rates the HS-550 compressor at 170 W, which works out to about 14 A at 12V. The HS-1000A is rated at 280 W, which works out to about 23 A. Our article on how many amps a train horn draws explains how that compares with what a tool battery can handle. Industry install guides estimate 2 to 4 hours for a DIY train horn install and 3 to 5 hours at a shop.
Real Cost: VEVOR Kit vs a Battery Train Horn
This table compares complete, working setups. For VEVOR, that means the 1.6 gal HS-660, the size most buyers end up comparing:
| Cost item | VEVOR HS-660 kit | Quad Train Horn for Milwaukee® 18v Battery |
|---|---|---|
| Horn + air source | $107.90 (1.6 gal, 90–120 PSI) | $245, compressor built in |
| Relay, wire, switches | Not included (about $48 for a ready-made kit like Vixen's) | None needed, the tool battery powers it |
| Install | 2–4 hours DIY, or 3–5 shop hours (about $420–$700 at $140/hr) | None, works out of the box |
| Rated loudness | 150 dB (no distance stated) | 140 dB rated |
| Remote | None, wired button you supply | 160 ft wireless remote included |
| Total, DIY | About $156 plus a weekend | $245 plus a battery if you don't own one |
| Total, shop-installed | About $576–$856 | $245 |
If you do the work yourself, VEVOR is the cheapest working train horn in this comparison, at roughly $90 less than our quad. If you pay a shop, it ends up costing two to three times as much. On warranty, the VEVOR listings we checked don't state a manufacturer warranty term. Instead they offer paid 1-, 2-, or 3-year protection plans at checkout. If you're comparing other air kits too, see our breakdowns of Kleinn train horn kits vs a battery horn and the Vixen Horns kit vs a battery horn.
The Quad Train Horn for Milwaukee® 18v Battery uses four metal trumpets in four different sizes and runs on any Milwaukee® M18™ pack without an adapter. Quad models are also available for DeWalt® 20V MAX™, Ryobi® ONE+™, and other battery platforms.
When the VEVOR Kit Is the Better Buy
A cheap air kit is the better choice for some buyers:
- You want the horn permanently on one vehicle, wired to a button in the cab.
- You enjoy wiring and don't count your own time as a cost.
- You want a small onboard air source. VEVOR says its compressor can fill car tires with an inflation gun added, though it notes truck tire pressures are too high for it.
It's the wrong choice if you want one horn to share between a truck, a boat, a UTV, and a tailgate, or if you'd rather not drill, wire, and drain a tank. That's where a battery horn has the clear advantage. Our guide to a battery train horn vs a compressor-and-tank kit covers the long-term maintenance side in more detail.
Want the 150 dB Tier Without the Install?
For about what a shop charges to install a VEVOR kit, you can get our loudest tier with nothing to install. The Extreme Series Train Horn for Milwaukee® 18v Battery is rated at 150 dB and uses an upgraded set of larger metal trumpets. It costs $365, comes with a 160 ft remote, and can be upgraded to a 2,000 ft long-range remote.
To compare every tier and battery platform side by side, start with our complete train horn buyer's guide.
FAQ
Does the VEVOR train horn kit come with wiring?
No. VEVOR's listings say the power switch and power cord are not included, and none of them list a relay or horn button. Plan on buying a relay, fuse holder, wire, and switches.
How loud is the VEVOR train horn kit really?
VEVOR rates every kit at 150 dB but doesn't give a measuring distance, so the figure can't be verified. One independent reviewer estimates 130 to 135 dB at 3 ft, but that's an estimate, not a measurement.
Which VEVOR tank size should I get?
The 0.8 and 1.6 gal kits both run at 90 to 120 PSI, so the bigger tank mostly gives you more blast time before the compressor kicks back on. The 2.6 gal HS-1000A runs at a higher 110 to 160 PSI but draws more current.
Can I move a VEVOR kit between vehicles?
Not easily. The tank and compressor are bolted down and wired into the vehicle's 12V system. A battery horn moves with you, and you just swap in a charged pack.