My physical therapist demonstrated a medical-grade TENS unit for my chronic back pain. He recommended I get a portable model, specifically the TENS 7000. It is a little complicated to use for the first time, but after that, it's reasonable. It really works well, even after only a few-minute session. The instruction manual tells how to use it and how to adjust it, but doesn't really tell you what settings to use for different sorts of pain or areas of the body. However, there is plenty of guidance online via video demonstrations.
One channel works the other one barely works.
I love this Tens Unit.My physical therapy person recommended it for me after I am discharged from their program. I feel it is safe to use rather than the electric one at PT.
