Used this unit 2 times. Then stopped working. Bad lead wire.
I've used the TENS 7000 3 x and it has been very helpful.
I used it for 20 minutes last night for the first time. Second night, the machine will not turn on. I should have researched more reviews. It sucks. Now I have to go through the return process which takes time out of my work day.
Official TENS 7000 Electrode Pads - 2" x 4" - 16 Count
Very easy to use and last a long time