Ultimately I just tossed it in the garbage
I can't say the machine never worked but after a month or so the adhesive on the conduction pads would no longer stick to my skin. I went to a few surgical supply stores to replace them ,only to find out that they seem to be non standard. I just put the machine away in it's box . When I returned to it to give it one more try, the entire machine would not work even with fresh  batteries. Ultimately I just tossed it in the garbage
Rating: 2 stars