ROULER ProlinePI 12V Magnetic LED Tow Light Kit — 20ft Harness, DOT/SAE Compliant (80" Reach)

ROULER ProlinePI is a 12V magnetic LED tow-light kit that provides DOT/SAE-compliant running, brake, and turn signals for trailers, RVs, dollies and other towed vehicles.

This all-in-one towing light kit combines powerful LEDs, a heavy-duty magnetic base, and a 20-foot wiring harness with a standard 4-pin connector so you can add full lighting to vehicles that lack permanent trailer wiring. The lamps meet DOT/SAE standards, are rated for long life, and are sized to support wide towing setups up to 80 inches, making them a practical temporary lighting solution for short- and long-distance towing.

How easy is the ROULER magnetic tow light kit to install?

Installation is designed to be quick and straightforward: attach each lamp to a clean metal surface using its scratch-resistant magnetic base, and plug the 4-pin connector into your tow vehicle or a converter. The kit includes assembly and operating instructions to guide setup and safe use.

• Strong magnetic bases that hold firmly to metal surfaces.
• 20-foot wire harness gives ample reach for most towing positions.
• Standard 4-pin connector compatible with common trailer sockets.
• Clear step-by-step instructions included with the kit.

What lighting functions and performance can I expect from these LEDs?

Each lamp provides clear running lights, brake lights, and turn signals using super-bright LEDs engineered for long life. The LEDs are DOT/SAE compliant, offering visibility that helps other drivers identify your trailer's movements in traffic and low-light conditions.

• Super-bright LED elements for strong visibility.
• Long operational life rated up to 100,000 hours.
• Meets applicable DOT and SAE lighting standards.
• All necessary functions (tail, brake, turn) in each light unit.

Will the magnetic mounts hold securely during towing and on different surfaces?

The kit uses a reinforced magnetic base designed to resist sliding or detachment when mounted on clean, flat metal surfaces. For best results, attach lights to unpainted or smooth metal areas and inspect mounts regularly during long trips to confirm secure placement.

• Scratch-resistant magnetic base for durable attachment.
• Strong holding force suitable for towing at highway speeds when properly mounted.
• Best practice: clean mounting area and check magnets periodically.
• Not intended for non-metal surfaces without an additional metal plate.

Can this kit handle wide trailers like boats and dollies?

Yes — the ROULER ProlinePI kit is sized to support towing setups up to about 80 inches wide. The long wiring length and magnetic placement flexibility make it especially useful for boat trailers, truck dollies, RV towing, and wider utility trailers that require temporary lighting.

• Designed to accommodate trailer widths up to 80 inches.
• 20-foot wiring harness helps reach across wide loads.
• Portable solution for temporary or emergency lighting needs.
• Works well for boats, trucks, RVs, and dollies.

Who this is for: The ROULER ProlinePI magnetic LED tow-light kit is aimed at vehicle owners and operators who need a portable, DOT/SAE-compliant lighting solution—ranging from weekend boaters and campers to commercial drivers managing dollies and temporary trailers. It’s ideal when permanent wiring isn’t available, when you need a quick temporary setup, or as an emergency backup for trailer lights. Follow the included instructions, mount on clean metal surfaces, and perform regular checks during use for safe towing.