Pick your mix and motivate your run with the Nike + iPod® Sport Kit. Nike+ lets you listen to tunes while you track your progress on an iPod® nano. Simply slip the Nike+ sensor into your Nike+ Ready shoe and head out. The Nike+ sensor slips unobtrusively into a pocket under the sockliner. Waterproof and virtually unbreakable. The iPod® nano tracks your progress, providing feedback on distance, time, pace and calories burned directly through the headphones. After your run, a performance summary appears on the nano screen and can be heard through the headphones. iPod® not included.