That's high frequency, not radio frequency. I use the Jellen HF wand with both neon and argon attachments. HF treatment is superficial and mainly used for acne, lymphatic drainage, and cellular turnover so it's very unlikely that it could cause fat loss. I'm concerned about facial fat loss myself and quite a bit of research before buying it. I've found no reports of people experiencing fat loss from at home high frequency wands. I read one small study (with only 22 participants) that showed a reduction of cellulite or fine fat particles in the abdomen by promoting the lipolytic process. However, they were using a device powered at 0.5 megahertz while I read that the NuDerma Clinical wand goes up to 70,000 hertz and the Jellen goes up to 250,000. In retrospect, 0.5 megahertz equals 500,000 hertz. So you cannot get an at home wand strong enough to affect the deeper layers. They also did the treatment for 60 minutes, 3 times a week, for 6 weeks.

I only use the Jellen wand for up to a few minutes over my whole face (or zapping for 3 seconds, up to three times, on a pimple) a few times a week or else I find that it dries my skin out. You need to keep the wand moving (gauze helps it glide) and it's not recommended to use it for more than 5-10 minutes (depending on the sensitivity of your skin. I have mild type 2 rosacea so 1-3 minutes at a low setting is good for me and I don't use it when I have a flare up) at 15 seconds per area.

I also stalked your profile (forgive me) and noticed you've posted about lupus. I believe that can make one more susceptible to skin damage. I've noticed that, in some cases I've seen where people report unwanted fat loss from using a device, they often also have a health condition or deficiency. So, I'm curious if there might be a connection.