All it says it that it generates a sophisticated electronic signal with a wide frequency band to safely treat the pain, tingling, burning and numbness.
So I am not sure it is one of those devices that you mentioned.

I have tried CBD, but I am not sure if I am taking the right stuff. The one I have used is full spectrum hemp extract 325mg. 2 capsules a day. I did not see any results, but I have not been using it very long. There is a high-end cannabis dispensary in my area, they may have better CBD. The product I got was from a health food store. I will read up on the CBD posts on this site.