What do you think of these bracelets?

I was scrolling online and saw an ad for bracelets that vibrate when you touch them, they were I guess designed for couples that are at a distance that miss each other and when you touch the pendant, the pendant for the other person vibrates and lights up, I guess letting them know that they are being missed by their partner which is pretty cool but I filtered this through my not so good brain

I realized you can use this as a security method, kinda like a lookout method if you are running an illegal organization, you ring them up if you see police, giving a warning to the others and they can cover up shit, head starts can be useful.
What do you think of these bracelets?
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