FARBIN Truck Back Up Alarm 12V–48V Reverse Horn — 110dB, IP67 Weatherproof

FARBIN Truck Back Up Alarm is a universal 12V–48V reverse warning horn engineered to deliver a 110±3 dB alert with IP67 waterproof protection for heavy vehicles and industrial equipment.

This compact backup alarm combines weatherproof construction, high sound output and simple wiring so drivers can add a durable reversing warning system to trucks, vans, forklifts, trailers, RVs and construction machinery. Built from reinforced nylon with epoxy-encapsulated electronics, the unit tolerates wide temperature ranges and resists dust and moisture, while the offered mounting bracket and reverse-polarity protection make installation straightforward for fleet fitters and DIY installers alike.

How loud is this alarm and will people hear it where I work?

The FARBIN alarm produces about 110 ±3 dB — a level designed to cut through ambient noise around work sites, loading docks and busy streets. That intensity increases the chance that pedestrians and other drivers notice a reversing vehicle quickly, even at moderate distances.

• Rated sound output: 110 ±3 dB
• Sharp beeping pattern optimized for attention
• Effective in noisy industrial and traffic environments
• Complies with common commercial vehicle warning practices

Is this alarm robust enough for outdoor and heavy-duty use?

Yes — the housing is molded from high-quality nylon and the internal electronics are embedded in epoxy, providing strong vibration resistance and corrosion protection. The unit meets IP67-level ingress protection, so it withstands dust and temporary immersion and operates across a wide temperature span.

• Materials: reinforced nylon with epoxy-embedded electronics
• Ingress protection: IP67 dust and water resistance
• Operating temperature: -30°C to 80°C
• Durability designed for construction, fleet and off-road use

Which vehicles and voltages are supported, and how do I mount it?

The FARBIN alarm is compatible with 12V to 48V electrical systems, making it suitable for most passenger and commercial vehicles, plus industrial machines. It includes a universal mounting bracket with slotted holes so you can attach it in several orientations and locations around the rear of the vehicle.

• Voltage range: universal 12V–48V support
• Recommended for trucks, vans, buses, RVs, forklifts, excavators and trailers
• Universal bracket with slotted holes for flexible mounting positions
• Reverse-polarity protected to prevent damage from incorrect wiring

How easy is installation and will it survive wiring mistakes?

Installation is intentionally simple: splice the positive lead into the reverse-light circuit or reverse switch and connect the negative to chassis ground. The device includes reverse-polarity protection to guard against accidental backward connections, and it powers on automatically when the reverse lights activate.

• Simple splice hookup to reverse light or switch
• Negative lead to ground/chassis connection
• Reverse-polarity protection reduces risk from wiring errors
• Automatic activation when reverse lights come on

Who is this for? Fleet managers, truck and equipment owners, construction supervisors and DIY vehicle upfitters who need a reliable, high-decibel reversing alarm will find the FARBIN Back Up Alarm a practical choice. It’s tailored for heavy-duty environments that demand a durable, weather-resistant warning horn with wide voltage compatibility and easy mounting options. If you require a rugged audible reverse alert that installs quickly and endures harsh conditions, this unit is built for that purpose.