Israel’s Theranica (see here previously) has reported successful long-term use of its Nerivio Remote Electrical Neuromodulation (REN) device for 409 migraine sufferers in the US. It consistently gave pain relief, functional disability relief and freedom.

https://www.prnewswire.com/news-releases/new-study-demonstrates-consistent-positive-long-term-adherence-and-efficacy-of-nerivio-for-treatment-of-migraine-301966050.html