I was thinking it was both a patch and a wearable. The patch goes on the back of your neck where the spinal chord attaches to brain stem (a lot of information flows through there). And a wearable to give you a read out.
Maybe it’s a color coded patch(for preferences /profile ) and software to use on any devise ( watch/phone/tablet). Make it out of reusable material, heat sensitive, reusable adhesion, great graphics and packaging.
I see this as a clarity patch. A way to filter out the static, innuendos and noise to allow for the essence of friendship to take hold.