banhao 12V Car Horn Kit with Button & Relay Harness — 130dB Dual High-Output, Weather-Resistant

BANHAO's 12V Car Horn Kit is a complete plug-and-play horn system with a dedicated button and relay harness that delivers a sharp 130dB warning tone for any 12V vehicle.

This kit bundles everything needed to upgrade a factory horn: two high-output horns, a matched relay harness for safe power delivery, and an independent switch button harness for convenient on/off control. Built for reliability, the horn assembly uses a resonant cavity and reinforced diaphragm to produce a deeper, longer-carrying sound than thin disc-style horns, while weather-resistant materials and a sturdy mounting bracket make it suitable for road, marine, and off-road use.

How loud is this horn and where will I notice the difference?

The BANHAO horn produces about 130dB, significantly louder and clearer than most stock horns. Its focused tone is engineered to cut through traffic noise and ambient sound so other road users can recognize your signal quickly.

• Measured peak around 130dB for immediate attention
• Spiral resonant cavity for deeper, more penetrating tone
• Two-horn set creates fuller soundstage than single-disc horns

Is installation difficult and will it harm my vehicle's electrical system?

Installation is intended to be straightforward: the package includes a pre-wired relay harness that manages current and protects the vehicle’s original circuits. The separate switch harness gives you on/off control without cutting into factory wiring, keeping the installation reversible and safe.

• Matched relay harness prevents overload and stabilizes current
• Dedicated switch harness avoids modifying factory circuits
• Basic hand tools and 12V connection knowledge required—no air compressors or extra plumbing

Will this horn withstand adverse weather and regular road use?

Yes — the components are housed in reinforced ABS and sealed with upgraded waterproof materials to resist moisture, dust, and salt exposure. Corrosion-resistant mounting hardware and a durable diaphragm help the horn maintain consistent output over time in varied climates.

• Weather-resistant housing and seals for wet conditions
• Robust ABS and metal bracket for vibration and impact resistance
• High-performance diaphragm designed for long service life

Which vehicles are compatible with this banhao horn kit?

The kit is engineered for universal 12V systems, making it suitable for most cars, trucks, SUVs, motorcycles, and many marine and off-road applications. Its wiring harness and mounting bracket are designed to adapt to common vehicle layouts without major modifications.

• Fits standard 12V cars, trucks, SUVs, and motorcycles
• Also suitable for boats, yachts, buses, and off-road vehicles
• Adjustable bracket fits varied mounting points

Who is this for: Drivers and fleet operators who want a louder, more reliable horn without complex installation — including commuters, commercial vehicle owners, off-road enthusiasts, and small boat operators. If you need a durable, weather-ready upgrade that preserves your vehicle's electrical integrity and gives you an unmistakable warning tone, the BANHAO 12V Car Horn Kit offers a practical, plug-and-play solution.