I just got this TENS unit today and it is already worth the price. I have chronic back problems and got this to help ease the pain. Even on a low setting it is better than any other brand I have used in the past.
I had a component failure that affected the charging process of my TENS7000. After several failures and attempted fixes, nothing changed. At this point it was decided I did fall into the category of warranty coverage. I have to give customer service personnel a 5+ rating.
Covers a lot of surface aeea and provides a lot support.
I have used this unit on my back with a slipped disk. I am constantly in pain. The Tens 7000 unit has helped with the pain a lot. It does not CURE the pain, but it helps, and if you are in pain, anything helps, and this unit has helped me a lot.