A free training session at the gym concluded with him giving me a treatment with one of these guns. It was impressive enough that I looked into getting one, but the price is just too high.
I found a very old model at a garage sale for a few bucks that works almost as well, and comes with a long handle to reach the back, which these new ones don’t have. And it has two balls instead of one on the end so you know it is not going to tarnished with the possibility of being used for earth women with their single yoni.