A Little Complicated but Really Helps
I occasionally have back pain and my wife has constant back and neck pain and this device really helps.  We've used simpler TENS machines before but I decided to use some HSA money and splurge a bit.  There are so many features that I have yet to explore nor probably won't but the easiest program gets the job done.  When I get back pain, it feels impossible to bend and move and this device lets me move around again until the pain subsides.  I have had it for over a year and still comes in handy.  Easy to charge and the charges lasts for quite a while with no use or even with use it will go for quite some time.  Definitely recommend.
Rating: 4 stars