I do apologize if I've been misleading. I promise I'm not here to be a troll and I don't want to "poison the well" so to speak.... As I said, my interest was in terms of functionality, and I am thankful for the input. Technically I went to school to study electronics, but it's been so long since I put it to proper use that I forgot a lot of things. I would like to be more helpful, because I "should" know, but I can't and I don't. Even so, I have no concerns about the safety of these devices. Things that really truly need a ground "should" have it stamped on the casing in big bold letters "must be grounded at all times." There's so much legal nonsense that goes into consumer electronics, that I'm confident in saying that, if HDplex knew there was any kind of risk to safety or people with medical conditions, they would not even ship it with the c8. Bear in mind too that they had the S4 in mind too when they designed it. The risk to their already small company would be too great. I don't like speaking "for" them, so I'm not trying to pretend to be some authority.... Confident... but not authoritative... Do what you feel you must.
This is fine, but by the same token, I would also like to not scare people unnecessarily.....Like I said, you're probably fine without it but the right thing must be stated otherwise people will downplay it and get bitten when they least expected it.