A device which would subtly broadcast your discomfort or frustration at a situation. I imagine it might be able to take the form of a high pitched frequency which would allow others to feel the discomfort you’re experiencing.
A small lapel pin which begins to pulse when you are wanting a quiet moment, to think, or meditate. Even in crowds. Signals you’re fine just feeling quiet at the moment.
Lapel Pin which screams when you become upset enough with someone around you.
Pin which allows those you are meeting to know when you’ve made a sorely wrong assumption about them without you having to correct them.
Press a small button and it will send out a signal to nearby friends when you need support.