The ThermiSmooth radio frequency generator can shrink fat beneath the skin in the face if that is the goal. The depth of the effects from a ThermiSmooth treatment is related to the size of the hand-piece used. A very small one or a bipolar one will only shrink skin. The depth of the radio frequency penetration is one third the size of the hand-piece. For instance, a 3 cm hand-piece will shrink fat 1 cm deep. The bipolar applicator only penetrates a few millimeters, therefore tightens skin with no fat loss.
Generally, loss of fat in the face is undesirable, so a very small or a bipolar paddle is used. This is been quite effective around the eyes and mouth. The result is basically tighter skin.
The newest addition to the ThermiSmooth is the ThermiSmooth 250, which is much more powerful and useful for shrinkage in the size of the arms, abdomen, neck, etc. Thank you for your question, and it appears you are on the right track. Excellent question.