Sure, there are lots of MP3 player speaker docks out there, but how many of them are designed to be attached to the handlebars of your bike? Just one, as far as I can tell. This bad boy locks onto your bike and hangs on no matter how rough your ride gets. It holds up to 1GB of your music and has a SD card slot to expand that as much as you'd like. You can listen via the built-in speaker or using the included headphones, which I would recommend using if you're riding around a city. Nothing will get you chased down faster than by blasting We Built This City on Rock and Roll for 20 blocks. Trust me. It's available now for $130.