... 2.Red, yellow, blue, red yellow, red blue etc. With 48 nano-scale genetic biological wave LED cold light sources With red, yellow, blue, red yellow, red blue ... increase collagen,increase the skin’s moistureFor Acne improvementRed+blue lightTreatment time:5 minutes per day, have a ... . Frequently use 2~ 3 times/week after improvement.Treat acne, while repair damaged skin Red and blue machine KN-7000C ...