Joe Blow, I do believe this is what a TENS unit looks like.Sorry, that was a different person. I know I can Google it, but what is a TENS unit?
http://www.amazon.com/truMedic-TENS-Electronic-Pulse-Massager/dp/B00DCEBLP4
As far as fixing TMJ/Tinnitus problems I would get at least get 2 opinions on the matter. In my case my dentist said my jaw,bite was normal.