It is a Micro & Macro HIFU Ultrasound Focus Ultrasound technology System , Professional for face lifting , skin tightening , and body contouring . ;) There are 7 catridges with difference depth . ( 4 cartridges for face and other 3 cartridges for body ) 1.5mm:targeting at the epidermis to improve superficial fine lines,skintone,skintexture,and fine pores. 3.0mm,aiming on the dermis to stimulate continuour regen eration of collagen. 4.5mm,cting on sama fascia layer to tighten the muscle bottom and achieve firmness 6.0mm,9.0mm,13.0mm,different layers of sectokill cellulite dissolve fat to gighten and shape, releasing curvaceous beauty The 2.0mm cartridges is the original one in the world , and can be operated in all parts without restricted area . It can do more precise and more targeted treatment . .Compare with the traditional HIFU , it reduce the Focus point diameter is 0.25mm , It means same energy with more smallers treatment point . It also why the 7D hifu machine feeling is more comfortable and result is more better .