@lioness I think you are asking about the Dolphin Neurostimulator that is a device to send an electric current (between 2 devices) which blocks the neurotransmitters (temporarily) and reduces pain. My physical therapist used this on me, and I would have improvement for about a week, not totally pain free, but less pain and less muscle spasms being caused by the spine problem. This was when I needed spine surgery and couldn't find a surgeon who would help me. It is a weird sensation when using it, and there were a few times I felt queasy, but it reduces pain without drugs. Here is the link about it.
https://www.dolphinmps.com/