... tightening machine,vacuum&RF&laser 3 in 1 system,for skin tightening, ... uses 650nm specific wave beam in auxiliary of vacuum negative pressure ... skin is sucked in, the frequency of 1-2.66MHz bipolar ... RF will heat the dermis and subcutaneous fat layer.After absorbing the heat, triglyceride in ... ensure good quality. Second,in case of any problem,inform ... for free in guarantee period.INFORMATION UPDATED ON ...