I would like to point out that I was the first to guess it was some sort of the radio in the last thread. That said, my first guess was anything but specific. Here we go:

RR = Radio Receiver with built-in atomic clock.
2150 = Frequency range in which it tunes into for updates on the atomic clock.

Notes: I really wish I understood astrology and math a little bit better. That understanding would translate better all the findings that come up with when you type in "atomic clock" and "2150" in a search engine.
I got "atomic clock" from the US Nimitz being a nuclear aircraft carrier who does a little bit of time traveling.
As for a "radio receiver", it doesn't do internet or satilite broadcasts but rather just old-fashioned AM/FM reception. The radio is still the place to get free music legally. If the Outlaw tuner was up to a good standard, you could get that music "loud and clear."

Umm, if this is wrong, can this be my funny guess also.