With the Nike + iPod Sport Kit (sold separately), iPod nano keeps you motivated from warm-up to cooldown on your run or in the gym. Lace up a pair of Nike+ running shoes and clip on your iPod nano. You’ll watch the miles unfold and hear real-time voice feedback along with your favorite songs.
https://www.amazon.com/Apple-Graphite-Generation-discontinued-Model/dp/B002M3SO0G

