[Easy Installation] Our trumpet speaker kit is very easy to install. [Super Loud] The air compressor and larger coil can make stronger air pressure, which makes the dual horn produce louder and clearer sound.
eBay
TUDIVING-PCP Air Compressor Oil Water Separator,4500Psi Air Filter,Two Stage Filtration Air Filter for Scuba Diving Compressor
Aliexpress UK
4 Trumpet Train Air Horn Kit. They are built for excellent performance and easy installation. Our specialized compressor kit will make your horns really sing. 【Easy Installation】：This train horn kit provides everything you need, including horns, compressor, air tank, pressure switch, hose, and basic mounting hardware.
eBay
LASER TREE 26L/min Air Pump Metal Nozzle Low Noice High Speed Full Metal Air Compressor for Air Assist Laser Module Wood Tools
Aliexpress UK
Makes a very loud wolf whistle sound. Tank Capacity: 6 liters. 1x Triple air horn. 1x Mounting hardware for the air horn. With integrated solenoid valve 12V. One-piece tank compressor system. DC 12V 20A 240W.
eBay
Air Suspension Kit with 4 Gallon Air Tank ,200 PSI Air Compressor ,Dual Air Pressure Gauge ,One Click Down Remote Controller
Aliexpress UK
Pump-Action Power – No gas or batteries needed! Take it anywhere you need to be heard. A sustainable, cost-effective alternative to gas-powered air horns.
eBay
Air Ride suspension DC 12V 480c Air Suspension Compressor Port 1/2"npt 2600Ib Air Bags with air ride manifold valve
Aliexpress UK
Long-distance driving will inevitably cause changes in tire pressure. Let this air compressor pump help you. It not only has good performance but also does not cover an area of land. You can put it in your trunk at will, which is very helpful for urgent needs.
eBay
Adjustable Aquarium Air Pump 110V~220V Air Pump 3W~12W For Bedroom Fish Tank Silent Oxygen Pump Air Compressor
Aliexpress UK
DB Output : 600DB. GOOD PERFORMANCE: With 6 00 dB sound level, this super loud air horn speaker has stable performance and higher work efficiency. UPDATED SOUND LEVEL: Stronger air pressure can be made of upgraded air compressor and larger coil, which can prompt the horn emit a louder and clearer sound.
eBay
Heavy duty Air Compressor Filter Reliable Diving Separator PCP Air Filter High Pressure Filter for Clean & Dry Air
Aliexpress UK
UNIVERSAL ELECTROMAGNETIC TWIN HORN 12V You can hear real sound from this horn here: LOW TONE 410Hz HIGH TONE 510Hz E-marked. 120db Dimension of single horn: Diameter: 9cm / 3.5" Depth: 8.5 cm / 3.3" Length: 10 cm / 3.93" Weight: 470g *2 SPADE TERMINAL FITTING,FIXING KIT INCLUDED & RELAY 12V 40 AMP THIS IS THE UNIVERSAL REPLACEMENT FOR ANY CAR,BIKE,TRUCK, VAN. NOT OEM PARTS. IN MOST CASES THIS WILL FIT UNTO YOUR CAR WITH NOTHING ELSE REQUIRED. ***NEW BOXED*** ***SET OF 2 HORNS***.
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Electric Air Pump EU/US Plug Portable Air Mat Air Bed Air Inflation Tool Home Household Camping Utility Tool 600W Air Compressor
Aliexpress UK
If you think other drivers won't see you coming, don't worry because they sure will hear you. They are built for excellent performance and easy installation. Our specialized compressor kit will make your horns really sing.
eBay
17 Inch 12V/24V 150db Super Loud Single Car Trumpet Air Horn Compressor Car Horn Speaker Kit for Cars Trucks Boats Motorcycles
Aliexpress UK