... of RF (radio frequency), IR (Infrared light), Roller and Vacuum increases blood circulation and oxygen intracellular diffusion ... IR (Infrared Light), Bipolar RF and mechanical Roller.3. 1-4MHz continuously adjustable RF frequency. Maximum penetrating depth outreach 10mm, ... requests.6. Removable roller of XF-I handpiece facilitate cleaning and avoid cross infection. 7. The adjustable energy of vacuum ...