Whelen M4 Series Linear Super-Led®, Surface Mount, Internal Flasher W/ Flash Patterns & Synchronize Feature


Amber w/ Amber Lens
Amber w/ Clear Lens
Blue w/ Blue Lens
Blue w/ Clear Lens
Red w/ Clear Lens
Red w/ Red Lens
White w/Clear Lens
Red-Blue Split w/ Clear Lens
Red-White Split w/ Clear Lens
Please select an option.

The only patented Linear-LED® lightheads designed to stand-up to the harsh environments and
standards of the industry while providing top of the line performance!


  • Surface mounted via two screws
  • Super-LED®s provide unmatched high-intensity warning, low current consumption
  • Unique lens shape is completely illuminated with patented Linear-LED® designed reflector assembly, unlike older designs that may have “dead spots” or “hot spots”
  • Lens and reflector are a sealed assembly
  • Lighthead is designed with the mounting screws located outside of the sealed lens/reflector assembly, eliminating water infiltration
  • Replaceable light engine is accessed from the rear of the lens/reflector assembly
  • Built-on rear gasket ensures that the lighthead and optional flange does not touch the vehicle’s surface, preventing contact
  • Updated design allows for faster and easier installation
  • M4 lightheads have multiple Scan-Lock™ flash patterns available. Choose from Solid, Left/Right, Top/Bottom, In/Out, or Diagonal sequencing. Meets KKK 1822F, NFPA 1901, SAE and EC65 specifications. Many flash patterns meet California Title XIII
  • Hard coating on lenses resists scratches, chemical, and corrosive damage. 
  • Available in Single or Split Colors.