Says it as it is!!!
been using my slendertone for a few - a month now - recently i have been getting back pain ...so i finally looked at the instructions(i glanced at them when i got my first one but didnt read fully) .......and i realised i have gone from the medium pad setting to the small YIPPPEEEEEEEE !!! Hence the pain as i had the pads in the wrong place DURRRRR