A few days ago I found these little sony battery powered speakers in my apartment, so I added them to my normal arsenal tools and various other objects I cary in my bag. Together with my $20 c.d. player and a copy of Board of Canada Geogaddi (or Mahavishnu, The Clash or anything that would be good to ride to). Now I can safely listen to music on my city rides and have an amazing ****ing time!