A Garmin Chirp In The Package

Am I the only one who doesn't know what a Garmin chirp is?  When my brother sent me a package, he accidentally put this little gadget in the box.  I asked him what it was for and explained that he was going to connect it to his gprs.  He asked me to try if it would work with mine.  It didn't so I'm sending it back to him.  I wonder when it would be introduced here.  From what I understand, it works to transmit a name or a small amount of data, just like a bluetooth would.  Am I right?

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