How long does the effect of Denser T-High for fine lines, inner elasticity, and lifting last?

Hello! As I enter my late 30s, my skin has thinned overall and fine lines have become noticeably visible, so I am looking into radiofrequency lifting treatments to firmly restore inner elasticity. I've heard that the Densor T-High device is the most popular these days because it is said to be less painful than Thermage and effectively fills the collagen density of the dermis layer to make it tight and firm! For those who have received Densor T-High treatment at Maypure, I am very curious to know how long the effects typically last. I want to know if the immediate improvement in skin texture or tightening effects last a long time even after just one session, or if I need to receive Densor T-High treatments periodically to maintain the long-lasting results. I would also appreciate it if you could share any information regarding downtime, such as swelling or redness, after the Densor T-High procedure.