Radiofrequency is a very popular and safe technology that many companies use under various names (Thermage, Profound, InMode - Evolve, Morpheus, etc...) Not all radiofrequency machines are the same but in general the primary benefit is firming loose skin - brought about by boosting collagen and elastin synthesis. So answer the question - doing RF waves on the face and hands will have no fat loss on the body. It's most suitable for tightening loose skin - not fat loss. There are some radiofrequency machines that claim target fat loss but in our experience when compared to other existing technologies (CoolSculpting, SmartLipo, Sculpsure) - it requires many more sessions with less impressive results.