The Code M has an MP3 embedded in the tongue of the shoe. You can download up to 100 songs into the shoe through a USB port. That port also serves to recharge the battery, which has a six-hour life.You can listen through wireless headphones, or apparently, the sneakers also have speakers.
So now there's really going to be some carnage if fools start stepping on the wrong person's sneakers.
I also like the idea of kicking someone's ass and then while they're lying on the ground, putting your sneaker next to their face with some appropriate song cued up. Like "We Are The Champions," or "Landslide" if the victim is an older lady. Or "Cat's in the Cradle" for some punk with daddy issues.
The Ultimate Shoe [ESPN]