the equipment combines both Laser and LED in the IR and NIR wavelength range. What the light does, in a nutshell, is to reduce pain and inflammation. It does this via a process of bio-stimulation and photo-stimulation, endogenous opiate production, slowing sensory nerve production, restoring cellular resonant energy, stimulating the Na/K pump mechanism in the cell membrane, and inhibiting bradykinin and leukotriene production. During this process, Cold Laser Therapy triggers the re-polarization of sick and injured cellular membranes to allow for essential nutrients to transfer from the blood into the cell.