Is the Ultrasonic Cavitation Device That Uses Oblong Paddles (4) Place on the Area - Does It Work?

I had 2 sessions done at a spa type wellness clinic and they put on some cream and saran wrap over that for 15 minutes. They they attached 4 paddles on my abdomen and start it at 80%, then 90% then 100% ten minutes apart, Felt nothing other than some heat from a heavy blanket place over the paddles. I'm highly skeptical that this device is just a gimmick and nothing has changed thus far.

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