led light therapy 1) 7 colors photon light(LED light) 2) 2 Ultrasonic waves 3) 2 BIO waves 4) LCD screen led light therapy IntroductionPhototherapy has long history, the ancient ... lot of lights of different wave-lengths, there are infrared light, visible light (imply red, orange, yellow, green, black, orchid, purple), ultraviolet ... .3.Please feel free to contact us for more details. led light therapy