this 7d hifu have seven cartridges : 1.5mm,2.0mm,3.0mm,4.5mm for face 6.0mm,9.0mm,13.0mm for body first, it is painless. compared with traditional hifu, because of its fast dosing speed, the pain is greatly reduced, and it brings a good sense of experience to customers. the second is the depth of 2.0mm, which is the first in the world to treat small wrinkles around the eyes and mouth. (1) remove wrinkles on around forehead, eyes, mouth, etc. (2) lifting and tightening both cheeks skin. (3) improving skin elasticity and shaping contour. (4) tightening the skin tissue on forehead, lifting the eyebrows lines. (5) improving skin complexion, making the skin delicate and bright (6) removing neck wrinkles, protecting neck aging.syi