Thanks for chiming in on this one!
Judging from a close-up look at Knosti's switching adapter plug, I think 36W is the maximum power output. Seems pretty anemic. I, also, noticed that the rotational speed seemed quite fast and there doesn't seem to be any way to modulate this, as well as no heat selection capability. The machine probably relies on whatever heat is generated by the ultrasonic action. I found The Audiophile Man review informative, too, as well as this YouTube review: