Has Four electrodes , multiple settings, the ability to be on battery or outlet....I love it. It has come in handy many times. Works like a charm and gives a lot of stimulation to the muscle just like at physical therapy. Well worth the money and a great buy at that.
really love my TENS device -- I had gotten one from my doctor and it did not last very long --it stopped charging == this one has the option of battery operated or charging -- love this item and choice of the battery or charge! great product
I use this unit for bulging disc neck and shoulder pain. I noticed after using in the morning and at bedtime for two days my pain was starting to ease. After a week I only used it at bedtime. Now after owning for 6 months I use this unit as needed on days when I overdo it. My doctor did warn me that overuse of the unit could cause more irritation and inflammation. If used as I did I think you will have great result with it.