... . PDT LED Skin Rejuvenation Beauty Equipment :Light wave : 200-900 nm,red,yellow,green,blue,purple,laser,1-30hz Energy : 20 J ... used to improve the metabolism for the skin.7.Laser light can penetrate into the skin very deeply and can be ... energy in proper sequence, it can accelerate metabolism effectively. 7. Laser light:Penetrate deep layer of skin, accelerate active tissue's metabolism ...