As seen in many TNG era episodes.

I purchased this online.

I was watching an old episode recently with L'Ursa and B'Etor (or whatever the hell those bitches are named) and saw that they were both wearing these on their arms, just below their shoulders. I'm not sure if these are comlinks, or decoration, or what. I'm not really that big of a fan of alien stuff, I'm usually more into federation stuff, but this piece came with a set of small pieces, so I figured I'd take it. I really don't know that much about it, so if you can provide any information, please e-mail me at matthewmunson@yahoo.com