What is InvisiLift and how does it work?

Thank you very much in advance for your time and answers. I wanted to know how does Invisilift work? How efficient is it? I see nothing posted on it and was thinking of getting it done since I am afraid to try Thermage as I 've heard people with fat loss issues. I am 37 and have fairly good skin. I wanted to know about Invisilift that I guess work with ultrasound. Thanks again.