Use this Nike + iPod Sport Kit to transform your iPod nano, iPod touch (2nd generation), or iPhone 3G S into a personal workout coach. This wireless sensor and receiver combination works exclusively with your Nike+ shoes and iPod nano, iPod touch, or iPhone 3G S to give you real-time feedback during workouts and let you track your performance on your Mac or PC. It will record your running statistics, pace, tim and calories burned.