... waves 3) 2 BIO waves 4) LCD screen led light therapy IntroductionPhototherapy has long history, the ancient Greek, ancient ... patented IPL technique, which can remove various pigment and vascular spot on skin without hurting the normal skin tissue, meanwhile ... lot of lights of different wave-lengths, there are infrared light, visible light (imply red, orange, yellow, green, black, orchid, purple), ...