Red(650 nm)--- One of the most powerful colors to increase blood circulation. Stimulate skin cells to excrete collagen to achieve firm and smooth texture. The red light penetrating 8-10mm is suitable for any type of skin; it can reach derma to stimulate fibre cells. Heating can improve blood circulation and collagen albumen hyperplasia to reduce wrinkles and make skin more elastic and smooth. The mild wave length is suitable for surrounding eyes and forehead. Blue(463 nm)---Excellent effect of curing acne, kill bacteria, improve sensitive skin The blue light penetrating about 0.5mm has the function of calming against skin rashes; suitable for the skin which is sensitive, oily and with skin rashes. It can adjust skin sebum secretion, effectively get rid of acne and whelk to reach the aim of beautification. Besides, the blue light can astringe and tighten loosened skin. Yellow(590 nm)---Improve skin muscle flexibility, improve immunity system and neural system The yellow light with wavelength 590nm is suitable for any type of skin; it can improve skin muscle flexibility, immunity system and neural system. It helps to firm skin and reshape the face.