Thanks for your question. I have a Relivion device, and I love it. I don't know anyone else that has tried it, but it has been a game-changer for me. It can be used as a preventive and/or acute treatment. I use it every day. It brings my pain level intensity down. Here is a link to their website.
https://www.relivion.com
This should answer some of your questions. If you want to ask me anything else about Relivion, feel free to reach out to me.
Peggy (Migraine.com team)