KDS ATL-25 Laser Marker 635nm Red Diode Indoor/Outdoor 25m Range It features a 635nm red semiconductor laser as its light source, with a visible wavelength of 650nm for ground marking. ✔ - Red semiconductor laser with a wavelength of 635nm. ✔ C:Wavelength: 635nm (Laser Source), 650nm (Ground Marking). byJuly 3, 2026