The Whelen M4 Perimeter Mount is a compact yet powerful lighthead designed for fire, EMS, law enforcement, and commercial vehicles. Its rectangular design allows for high-intensity illumination, enhancing visibility in critical situations.

Equipped with Whelen’s Linear Super-LED® technology, the M4 delivers bright, consistent light output. This ensures superior warning and scene lighting, making it an essential safety feature for emergency and commercial fleets.

The M4 incorporates Dynamic Variable Intensity™ (DVI™) technology, which automatically adjusts brightness during nighttime operations. By gradually increasing or decreasing intensity, this feature enhances safety by effectively alerting oncoming traffic and creating safer scenes.

Available in single- or dual-color models, the M4 can be configured for primary warning or a combination of warning and scene lighting. Its hard-coated, impact-resistant lenses provide durability against sand, sun, salt, and road chemicals, ensuring long-lasting reliability in demanding environments.