Apple Nike + iPod Sport Kit for iPod nano 1G, 2G, 3G Compatibility: iPod nano 1G, 2G, 3G Transforms your iPod nano into a personal workout coach--nano can provide real-time, spoken feedback that alerts you to workout milestones Lets your iPod nano track your running time, distance, pace, and calories burned Sync your iPod nano to transfer your workout data to iTunes and nikeplus.com for your performance history and more Kit includes wireless sensor for Nike+ shoes and wireless receiver for iPod nano