What are they

I went to a meeting a while ago and got a couple of MP3 players and being an old duffer don't have any idea what they are or what they are for. Can anybody help me. They are about 1 inch by an inch and a half n maybe 3/8 thick.


Well-known member
They improve the radio reception in car radios. Use double-sided tape to mount one up on the dashboard. You'll find your favorite stations come in from much farther away.