At my office, I've decorated it 60's style, but hated having my modern computer speakers out. So I bought a 60's model Zenith radio, tuned it to 99.3 and bought a "Jupiter Jack" from Walgreens for $4.99. It transmits music from an iPod, or anything with a headphone jack over two different frequencies. It even comes with the battery, and it works great so far. No more ugly speakers, and my sweet old radio makes my 60's mp3's sound authentic.
Worth a shot for $5!
Worth a shot for $5!