> - Safe, hands-free sessions with auto-shutoff for worry-free operation. The default timing for auto-shutdown is 30 minutes. Providing an energy density of 150 mW/cm , equivalent to a $5,000 clinic device. Use it for 15-60 minutes during yoga, reading, or before sleeping. > - 660nm+850nm combo (deep tissue repair), pure 660nm (surface skin care), or pure 850nm (joint/muscle relaxation therapy). The red light component works to enhance blood flow, aiding in nutrient delivery to cells.